How severe is this DTC?

The severity of this code can vary significantly from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention as it can cause permanent damage to internal engine components.

What are some of the symptoms of the code?

Symptoms of a P3408 trouble code may include:

• Increased fuel consumption
• Poor engine performance
• Engine misfires
• Service engine soon light
• Check engine light illuminated

What are some common causes of the code?

Causes

of this P3408 code may include:

• Faulty variable timing solenoid
• Low engine oil level or pressure
• Restricted oil passage
• Faulty or damaged wiring
• Corroded, damaged, or loose connector
• Faulty ECM

What are the troubleshooting steps for P3408?

The first step in the troubleshooting process for any malfunction is to research Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine. This can save you time and money as it’s essentially a known fix for a known issue.

The second step is to check the engine oil condition and confirm it’s maintained at the proper level. Then locate all components associated with the cylinder 1 exhaust valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components, including the variable timing solenoid, switches, fault indicators, and the ECM. Perform a thorough visual inspection to verify that the associated wiring shows no obvious defects such as scraping, rubbing, bare wires, or burns. Next, check connectors and connections for security, corrosion, and damaged pins. Consult specific vehicle technical data to verify the configuration and identify each component incorporated into the cylinder 1 exhaust valve control circuit.

Advanced Steps

Advanced steps become very vehicle-specific and require appropriate advanced equipment to operate accurately. These procedures require a digital multimeter and vehicle-specific technical references. In this situation, an oil pressure gauge may also facilitate the troubleshooting process to confirm an oil passage restriction.

Voltage Checks

Reference voltage and acceptable ranges may vary depending on the specific vehicle and circuit configuration. Specific technical data will include troubleshooting charts and the appropriate sequence to follow to help you establish an accurate diagnosis.

If this process identifies the absence of a power source or ground, continuity tests may be required to verify the integrity of wiring, connectors, and other components. Continuity tests should always be performed with power disconnected from the circuit, and normal readings for wiring and connections should be 0 ohms resistance. Resistance or lack of continuity is an indication of faulty wiring that is open, shorted, or corroded and should be repaired or replaced.

What are the common repairs for this code?

• Replacement of variable valve timing solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Clearing blocked oil passages
• ECM replacement

Common Mistake

• Replacing the variable valve timing solenoid when insufficient oil pressure or faulty wiring causes the ECM to set this code.

I hope the information in this article has been helpful in guiding you in the right direction to correct the issue with your exhaust valve control circuit error code. This article is strictly informational, and specific technical data and service bulletins for your vehicle should always take priority.

How severe is this DTC?

The severity of this code can vary significantly from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention as it can cause permanent damage to internal engine components.

What are some symptoms of the code?

Symptoms of a P3423 fault code may include:

• Increased fuel consumption
• Poor engine performance
• Engine misfires
• Service engine soon light illuminated
• Check engine light on

What are some common causes of the code?

Causes

of this P3423 code may include:

• Faulty variable timing solenoid
• Low engine oil level or pressure
• Restricted oil passage
• Faulty or damaged wiring
• Corroded, damaged, or loose connector
• Faulty ECM

What are the troubleshooting steps for P3423?

The first step in the troubleshooting process for any malfunction is to research Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine. This can save you time and money as it’s essentially a known fix for a known issue.

The second step is to check the engine oil condition and confirm it’s maintained at the proper level. Then locate all components associated with the cylinder 1 exhaust valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components including the variable timing solenoid, switches, fault indicators, and the ECM. Perform a thorough visual inspection to verify that the associated wiring shows no obvious defects such as scraping, rubbing, bare wires, or burns. Next, check connectors and connections for security, corrosion, and damaged pins. Consult specific vehicle technical data to verify configuration and identify each component incorporated into the cylinder 1 exhaust valve control circuit.

Advanced Steps

Advanced steps become very vehicle-specific and require appropriate advanced equipment to perform accurately. These procedures require a digital multimeter and vehicle-specific technical references. In this situation, an oil pressure gauge may also facilitate the troubleshooting process to confirm an oil passage restriction.

Voltage Checks

Reference voltage and acceptable ranges may vary depending on the specific vehicle and circuit configuration. Specific technical data will include troubleshooting charts and the proper sequence to follow to help you establish an accurate diagnosis.

If this process identifies the absence of a power source or ground, continuity tests may be required to verify the integrity of wiring, connectors, and other components. Continuity tests should always be performed with power disconnected from the circuit, and normal readings for wiring and connections should be 0 ohms resistance. Resistance or lack of continuity indicates faulty wiring that is open, shorted, or corroded and should be repaired or replaced.

What are common repairs for this code?

• Replacement of variable valve timing solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Clearing blocked oil passages
• ECM replacement

Common Mistake

• Replacing the variable valve timing solenoid when insufficient oil pressure or faulty wiring causes the ECM to set this code.

I hope the information in this article has been helpful in pointing you in the right direction to correct the issue with your exhaust valve control circuit error code. This article is strictly informational, and specific vehicle technical data and service bulletins should always take priority.

How severe is this DTC?

The severity of this code can vary significantly from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention as it can cause permanent damage to internal engine components.

What are some of the symptoms of the code?

Symptoms of a P3407 trouble code may include:

• Increased fuel consumption
• Poor engine performance
• Engine misfires
• Service engine soon light
• Check engine light illuminated

What are some common causes of the code?

Causes

of this P3407 code may include:

• Faulty variable valve timing solenoid
• Low engine oil level or pressure
• Restricted oil passage
• Faulty or damaged wiring
• Corroded, damaged, or loose connector
• Faulty ECM

What are the troubleshooting steps for P3407?

The first step in the troubleshooting process for any malfunction is to search for Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine. This can save you time and money as it’s essentially a known fix for a known problem.

The second step is to check the engine oil condition and confirm it is maintained at the proper level. Then locate all components associated with the cylinder 1 exhaust valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components, including the variable valve timing solenoid, switches, fault indicators, and the ECM. Perform a thorough visual inspection to check that the associated wiring shows no obvious defects such as scraping, rubbing, bare wires, or burn marks. Next, check connectors and connections for security, corrosion, and damaged pins. Consult specific vehicle technical data to verify the configuration and identify each component incorporated into the cylinder 1 exhaust valve control circuit.

Advanced Steps

Advanced steps become very vehicle-specific and require appropriate advanced equipment to operate accurately. These procedures require a digital multimeter and vehicle-specific technical references. In this situation, an oil pressure gauge may also facilitate the troubleshooting process to confirm an oil passage restriction.

Voltage Checks

Reference voltage and acceptable ranges may vary depending on the specific vehicle and circuit configuration. Specific technical data will include troubleshooting charts and the proper sequence to follow to help you establish an accurate diagnosis.

If this process identifies the absence of a power source or ground, continuity tests may be required to verify the integrity of wiring, connectors, and other components. Continuity tests should always be performed with the power disconnected from the circuit, and normal readings for wiring and connections should be 0 ohms of resistance. Resistance or lack of continuity is an indication of faulty wiring that is open, shorted, or corroded and should be repaired or replaced.

What are the common repairs for this code?

• Replacement of the variable valve timing solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Clearing blocked oil passages
• ECM replacement

Common Mistake

• Replacing the variable valve timing solenoid when insufficient oil pressure or faulty wiring is causing the ECM to set this code.

I hope the information in this article has been helpful in pointing you in the right direction to correct the issue with your exhaust valve control circuit error code. This article is strictly informational, and your vehicle’s specific technical data and service bulletins should always take priority.

How severe is this DTC?

The severity of this code can vary significantly from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention as it can cause permanent damage to internal engine components.

What are some of the symptoms of the code?

Symptoms of a P3422 fault code may include:

• Increased fuel consumption
• Poor engine performance
• Engine misfires
• Service engine soon light illuminated
• Check engine light on

What are some common causes of the code?

Causes

of this P3422 code may include:

• Faulty variable timing solenoid
• Low engine oil level or pressure
• Restricted oil passage
• Faulty or damaged wiring
• Corroded, damaged, or loose connector
• Faulty ECM

What are the troubleshooting steps for P3422?

The first step in the troubleshooting process for any malfunction is to search for Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine. This can save you time and money as it’s essentially a known fix for a known issue.

The second step is to check the engine oil condition and confirm it is maintained at the appropriate level. Then locate all components associated with the cylinder 1 exhaust valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate several components, including the variable timing solenoid, switches, fault indicators, and the ECM. Perform a thorough visual inspection to check that the associated wiring shows no obvious defects such as scraping, rubbing, bare wires, or burns. Next, check the connectors and connections for security, corrosion, and damaged pins. Consult the specific vehicle’s technical data to verify the configuration and identify each component incorporated into the cylinder 1 exhaust valve control circuit.

Advanced Steps

Advanced steps become very vehicle-specific and require appropriate advanced equipment to operate accurately. These procedures require a digital multimeter and the vehicle-specific technical references. In this situation, an oil pressure gauge may also facilitate the troubleshooting process to confirm an oil passage restriction.

Voltage Checks

Reference voltage and acceptable ranges can vary depending on the specific vehicle and circuit configuration. The specific technical data will include troubleshooting charts and the proper sequence to follow to help you establish an accurate diagnosis.

If this process identifies the absence of a power source or ground, continuity tests may be required to verify the integrity of the wiring, connectors, and other components. Continuity tests should always be performed with the power disconnected from the circuit, and normal readings for wiring and connections should be 0 ohms of resistance. Resistance or lack of continuity is an indication of faulty wiring that is open, shorted, or corroded and must be repaired or replaced.

What are the common repairs for this code?

• Replacing the variable valve timing solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Clearing blocked oil passages
• Replacing the ECM

Common Mistake

• Replacing the variable valve timing solenoid when insufficient oil pressure or faulty wiring is causing the ECM to set this code.

I hope the information in this article has been helpful in guiding you in the right direction to correct the issue with your exhaust valve control circuit error code. This article is strictly informational, and the technical data and service bulletins specific to your vehicle should always take priority.

How severe is this DTC?

The severity of this code can vary significantly from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention as it can cause permanent damage to internal engine components.

What are some of the symptoms of the code?

Symptoms of a P3406 trouble code may include:

• Increased fuel consumption
• Poor engine performance
• Engine misfires
• Service engine soon light
• Check engine light illuminated

What are some common causes of the code?

Causes

of this P3406 code may include:

• Faulty variable valve timing solenoid
• Low engine oil level or pressure
• Restricted oil passage
• Faulty or damaged wiring
• Corroded, damaged, or loose connector
• Faulty ECM

What are the troubleshooting steps for P3406?

The first step in the troubleshooting process for any malfunction is to research Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine. This can save you time and money as it’s essentially a known fix for a known issue.

The second step is to check the engine oil condition and confirm it is maintained at the proper level. Then locate all components associated with the cylinder 1 exhaust valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components, including the variable valve timing solenoid, switches, fault indicators, and the ECM. Perform a thorough visual inspection to check that the associated wiring shows no obvious defects such as scraping, rubbing, bare wires, or burn marks. Next, check connectors and connections for security, corrosion, and damaged pins. Consult specific vehicle technical data to verify the configuration and identify each component incorporated into the cylinder 1 exhaust valve control circuit.

Advanced Steps

Advanced steps become very vehicle-specific and require appropriate advanced equipment to operate accurately. These procedures require a digital multimeter and vehicle-specific technical references. In this situation, an oil pressure gauge may also facilitate the troubleshooting process to confirm an oil passage restriction.

Voltage Checks

Reference voltage and acceptable ranges may vary depending on the specific vehicle and circuit configuration. Specific technical data will include troubleshooting charts and the proper sequence to follow to help you establish an accurate diagnosis.

If this process identifies the absence of a power source or ground, continuity tests may be required to verify the integrity of wiring, connectors, and other components. Continuity tests should always be performed with the power disconnected from the circuit, and normal readings for wiring and connections should be 0 ohms of resistance. Resistance or lack of continuity is an indication of faulty wiring that is open, shorted, or corroded and must be repaired or replaced.

What are the common repairs for this code?

• Replacement of the variable valve timing solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Clearing blocked oil passages
• ECM replacement

Common Mistake

• Replacing the variable valve timing solenoid when insufficient oil pressure or faulty wiring is causing the ECM to set this code.

I hope the information contained in this article has been helpful in pointing you in the right direction to correct the issue with your exhaust valve control circuit error code. This article is strictly informational, and the technical data and service bulletins specific to your vehicle should always take priority.

How severe is this DTC?

The severity of this code can vary significantly from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention as it can cause permanent damage to internal engine components.

What are some of the symptoms of the code?

Symptoms of a P3421 trouble code may include:

• Increased fuel consumption
• Poor engine performance
• Engine misfires
• Service engine soon light illuminated
• Check engine light illuminated

What are some common causes of the code?

Causes

of this P3421 code may include:

• Faulty variable valve timing solenoid
• Low engine oil level or pressure
• Restricted oil passage
• Faulty or damaged wiring
• Corroded, damaged, or loose connector
• Faulty ECM

What are the troubleshooting steps for P3421?

The first step in the troubleshooting process for any malfunction is to research the Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine. This can save you time and money as it is essentially a known fix for a known issue.

The second step is to check the engine oil condition and confirm it is maintained at the proper level. Then locate all components associated with the cylinder 1 exhaust valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate several components, including the variable timing solenoid, switches, fault indicators, and the ECM. Perform a thorough visual inspection to check that the associated wiring shows no obvious defects such as scraping, rubbing, bare wires, or burn marks. Next, check the connectors and connections for security, corrosion, and damaged pins. Consult the specific vehicle’s technical data to verify the configuration and identify each component incorporated into the cylinder 1 exhaust valve control circuit.

Advanced Steps

Advanced steps become very vehicle-specific and require appropriate advanced equipment to perform accurately. These procedures require a digital multimeter and the vehicle-specific technical references. In this situation, an oil pressure gauge may also facilitate the troubleshooting process to confirm an oil passage restriction.

Voltage Checks

Reference voltage and acceptable ranges can vary depending on the specific vehicle and circuit configuration. The specific technical data will include troubleshooting charts and the proper sequence to follow to help you establish an accurate diagnosis.

If this process identifies the absence of a power source or ground, continuity tests may be required to verify the integrity of the wiring, connectors, and other components. Continuity tests should always be performed with the power disconnected from the circuit, and normal readings for wiring and connections should be 0 ohms of resistance. Resistance or lack of continuity is an indication of faulty wiring that is open, shorted, or corroded and must be repaired or replaced.

What are the common repairs for this code?

• Replacement of the variable valve timing solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Clearing blocked oil passages
• ECM replacement

Common Mistake

• Replacing the variable valve timing solenoid when insufficient oil pressure or faulty wiring is causing the ECM to set this code.

I hope the information contained in this article has been helpful in pointing you in the right direction to correct the issue with your exhaust valve control circuit error code. This article is strictly informational, and the technical data and service bulletins specific to your vehicle should always take priority.

How severe is this DTC?

The severity of this code can vary significantly from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention as it can cause permanent damage to internal engine components.

What are some of the symptoms of the code?

Symptoms of a P3405 trouble code may include:

• Increased fuel consumption
• Poor engine performance
• Engine misfires
• Service engine soon light illuminated
• Check engine light on

What are some common causes of the code?

Causes

of this P3405 code may include:

• Faulty variable valve timing solenoid
• Low engine oil level or pressure
• Restricted oil passage
• Faulty or damaged wiring
• Corroded, damaged, or loose connector
• Faulty ECM

What are the troubleshooting steps for P3405?

The first step in the troubleshooting process for any malfunction is to search for Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine. This can save you time and money as it is essentially a known fix for a known issue.

The second step is to check the engine oil condition and confirm it is maintained at the proper level. Then locate all components associated with the Cylinder 1 Exhaust Valve Control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components, including the variable timing solenoid, switches, fault indicators, and the ECM. Perform a thorough visual inspection to check that the associated wiring does not have obvious defects such as chafing, rubbing, bare wires, or burn marks. Next, check the connectors and connections for security, corrosion, and damaged pins. Consult the specific vehicle’s technical data to verify the configuration and identify each component incorporated into the Cylinder 1 Exhaust Valve Control circuit.

Advanced Steps

Advanced steps become very vehicle-specific and require appropriate advanced equipment to function accurately. These procedures require a digital multimeter and the vehicle-specific technical references. In this situation, an oil pressure gauge may also facilitate the troubleshooting process to confirm an oil passage restriction.

Voltage Checks

Reference voltage and acceptable ranges can vary depending on the specific vehicle and circuit configuration. The specific technical data will include troubleshooting charts and the proper sequence to follow to help you establish an accurate diagnosis.

If this process identifies the absence of a power source or ground, continuity tests may be required to verify the integrity of the wiring, connectors, and other components. Continuity tests should always be performed with the power disconnected from the circuit, and normal readings for wiring and connections should be 0 ohms of resistance. Resistance or lack of continuity is an indication of faulty wiring that is open, shorted, or corroded and must be repaired or replaced.

What are the common repairs for this code?

• Replacing the variable valve timing solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Clearing blocked oil passages
• Replacing the ECM

Common Mistake

• Replacing the variable valve timing solenoid when insufficient oil pressure or faulty wiring is causing the ECM to set this code.

I hope the information in this article has been helpful in pointing you in the right direction to correct the issue with your exhaust valve control circuit error code. This article is strictly informational, and the technical data and service bulletins specific to your vehicle should always take priority.

How severe is this DTC?

The severity of this code can vary significantly from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention as it can cause permanent damage to internal engine components.

What are some symptoms of the code?

Symptoms of a P3420 trouble code may include:

• Increased fuel consumption
• Poor engine performance
• Engine misfires
• Service engine soon light
• Check engine light illuminated

What are some common causes of the code?

Causes

of this P3420 code may include:

• Faulty variable timing solenoid
• Low engine oil level or pressure
• Restricted oil passage
• Faulty or damaged wiring
• Corroded, damaged, or loose connector
• Faulty ECM

What are the troubleshooting steps for P3420?

The first step in the troubleshooting process for any malfunction is to research Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine. This can save you time and money as it’s essentially a known fix for a known issue.

The second step is to check the engine oil condition and confirm it’s maintained at the proper level. Then locate all components associated with the cylinder 1 exhaust valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components including the variable timing solenoid, switches, fault indicators, and ECM. Perform a thorough visual inspection to verify that the associated wiring shows no obvious defects such as scraping, rubbing, bare wires, or burns. Next, check connectors and connections for security, corrosion, and damaged pins. Consult specific vehicle technical data to verify configuration and identify each component incorporated into the cylinder 1 exhaust valve control circuit.

Advanced Steps

Advanced steps become very vehicle-specific and require appropriate advanced equipment to operate accurately. These procedures require a digital multimeter and vehicle-specific technical references. In this situation, an oil pressure gauge may also facilitate the troubleshooting process to confirm an oil passage restriction.

Voltage Checks

Reference voltage and acceptable ranges may vary depending on the specific vehicle and circuit configuration. Specific technical data will include troubleshooting charts and the appropriate sequence to follow to help you establish an accurate diagnosis.

If this process identifies the absence of a power source or ground, continuity tests may be required to verify the integrity of wiring, connectors, and other components. Continuity tests should always be performed with power disconnected from the circuit and normal readings for wiring and connections should be 0 ohms resistance. Resistance or lack of continuity is an indication of faulty wiring that is open, shorted, or corroded and should be repaired or replaced.

What are common repairs for this code?

• Replacement of variable valve timing solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Clearing blocked oil passages
• ECM replacement

Common Mistake

• Replacing the variable valve timing solenoid when insufficient oil pressure or faulty wiring causes the ECM to set this code.

I hope the information contained in this article has been helpful in pointing you in the right direction to correct the issue with your exhaust valve control circuit error code. This article is strictly informational and specific vehicle technical data and service bulletins should always take priority.

How severe is this DTC?

The severity of this code can vary significantly from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention as it can cause permanent damage to internal engine components.

What are some symptoms of the code?

Symptoms of a P3419 trouble code may include:

• Increased fuel consumption
• Poor engine performance
• Engine misfires
• Service engine soon light
• Check engine light illuminated

What are some common causes of the code?

Causes

of this P3419 code may include:

• Faulty variable timing solenoid
• Low engine oil level or pressure
• Restricted oil passage
• Faulty or damaged wiring
• Corroded, damaged, or loose connector
• Faulty ECM

What are the troubleshooting steps for P3419?

The first step in the troubleshooting process for any malfunction is to search for Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine. This can save you time and money as it’s essentially a known fix for a known issue.

The second step is to check the engine oil condition and confirm it’s maintained at the proper level. Then locate all components associated with the cylinder 1 exhaust valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components, including the variable timing solenoid, switches, fault indicators, and the ECM. Perform a thorough visual inspection to verify that the associated wiring shows no obvious defects such as scraping, rubbing, bare wires, or burns. Next, check connectors and connections for security, corrosion, and damaged pins. Consult specific vehicle technical data to verify configuration and identify each component incorporated into the cylinder 1 exhaust valve control circuit.

Advanced Steps

Advanced steps become very vehicle-specific and require appropriate advanced equipment to operate accurately. These procedures require a digital multimeter and vehicle-specific technical references. In this situation, an oil pressure gauge may also facilitate the troubleshooting process to confirm an oil passage restriction.

Voltage Checks

Reference voltage and acceptable ranges may vary depending on the specific vehicle and circuit configuration. Specific technical data will include troubleshooting charts and the proper sequence to follow to help you establish an accurate diagnosis.

If this process identifies the absence of a power source or ground, continuity tests may be required to verify the integrity of wiring, connectors, and other components. Continuity tests should always be performed with power disconnected from the circuit, and normal readings for wiring and connections should be 0 ohms resistance. Resistance or lack of continuity indicates faulty wiring that is open, shorted, or corroded and should be repaired or replaced.

What are common repairs for this code?

• Replacement of variable valve timing solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Clearing blocked oil passages
• ECM replacement

Common Mistake

• Replacing the variable valve timing solenoid when insufficient oil pressure or faulty wiring causes the ECM to set this code.

I hope the information in this article has been helpful in guiding you in the right direction to correct the issue with your exhaust valve control circuit error code. This article is strictly informational, and specific vehicle technical data and service bulletins should always take priority.

How severe is this DTC?

The severity of this code can vary significantly from moderate to severe depending on the specific symptoms of the malfunction. A misfire requires immediate attention as it can cause permanent damage to internal engine components.

What are some of the symptoms of the code?

Symptoms of a P3418 trouble code may include:

• Increased fuel consumption
• Poor engine performance
• Engine misfires
• Service engine soon light
• Check engine light illuminated

What are some common causes of the code?

Causes

of this P3418 code may include:

• Faulty variable timing solenoid
• Low engine oil level or pressure
• Restricted oil passage
• Faulty or damaged wiring
• Corroded, damaged, or loose connector
• Faulty ECM

What are the troubleshooting steps for P3418?

The first step in the troubleshooting process for any malfunction is to search for Technical Service Bulletins (TSBs) for the specific vehicle by year, model, and engine. This can save you time and money as it’s essentially a known fix for a known issue.

The second step is to check the engine oil condition and confirm it is maintained at the proper level. Then locate all components associated with the cylinder 1 exhaust valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components, including the variable timing solenoid, switches, fault indicators, and the ECM. Perform a thorough visual inspection to verify that the associated wiring shows no obvious defects such as scraping, rubbing, bare wires, or burn marks. Next, check connectors and connections for security, corrosion, and damaged pins. Consult specific vehicle technical data to verify the configuration and identify each component incorporated into the cylinder 1 exhaust valve control circuit.

Advanced Steps

Advanced steps become very vehicle-specific and require appropriate advanced equipment to operate accurately. These procedures require a digital multimeter and vehicle-specific technical references. In this situation, an oil pressure gauge may also facilitate the troubleshooting process to confirm an oil passage restriction.

Voltage Checks

Reference voltage and acceptable ranges may vary depending on the specific vehicle and circuit configuration. Specific technical data will include troubleshooting charts and the proper sequence to follow to help you establish an accurate diagnosis.

If this process identifies the absence of a power source or ground, continuity tests may be required to verify the integrity of wiring, connectors, and other components. Continuity tests should always be performed with the power disconnected from the circuit, and normal readings for wiring and connections should be 0 ohms of resistance. Resistance or lack of continuity is an indication of faulty wiring that is open, shorted, or corroded and must be repaired or replaced.

What are the common repairs for this code?

• Replacement of the variable valve timing solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Clearing blocked oil passages
• ECM replacement

Common Mistake

• Replacing the variable valve timing solenoid when insufficient oil pressure or faulty wiring is causing the ECM to set this code.

I hope the information contained in this article has been helpful in pointing you in the right direction to correct the issue with your exhaust valve control circuit error code. This article is strictly informational, and your vehicle-specific technical data and service bulletins should always take priority.