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 P3410 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 P3410 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 P3410?

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 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 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 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 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 your vehicle-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 symptoms of the code?

Symptoms of a P3425 trouble code may include:

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

What are some common causes of the code?

Causes

of this P3425 code may include:

• Faulty cylinder deactivation 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 P3425?

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. In some circumstances, this can save you significant time in the long run by pointing you in the right direction.

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 4 deactivation intake valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components, including the deactivation 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. This process should include all wiring connectors and connections to all components, including the ECM. Consult vehicle-specific technical data to verify the configuration of the cylinder 4 deactivation/intake valve control circuit and confirm each component incorporated in the circuit that may include a fuse or fusible link.

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.

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 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 deactivation solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Changing oil and filter
• Cleaning blocked oil passages
• ECM replacement

Common Mistake

Replacing the deactivation 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 the cylinder 4 deactivation/intake valve control circuit error code. This article is strictly informational, and technical data and service bulletins specific to your vehicle should always take priority.

Code P3429 – Causes, Symptoms, and Solutions

---

1. Severity of Code P3429

⚠️ The severity of code P3429 ranges from moderate to severe.
A misfire caused by this issue can lead to permanent damage to internal engine components if not addressed promptly.

---

2. Symptoms of Code P3429

🔍 If your vehicle has a P3429, you may observe:
✅ Engine misfires (the engine runs irregularly)
✅ Increased fuel consumption
✅ Loss of power and poor performance
✅ Illuminated engine light (Check Engine Light)

---

3. Possible Causes of Code P3429

🔧 Several factors can trigger a P3429:
✔️ Faulty cylinder deactivation solenoid
✔️ Low engine oil level or insufficient pressure
✔️ Clogged oil passages
✔️ Damaged, worn, or short-circuited wiring
✔️ Corroded or poorly connected connectors
✔️ Faulty ECM (engine control module) (rare)

---

4. How to Fix Code P3429?

🔍 Step 1: Check Technical Service Bulletins (TSBs)

📌 Before any intervention, consult the TSBs specific to your vehicle.
Some models may have known solutions for this issue, which could save you time and money.

🔍 Step 2: Check Engine Oil

🛢️ Check the oil level and ensure it is within the recommended range.
✔️ If the oil is dirty or insufficient, replace the oil and filter.
✔️ Lack of oil can prevent the proper operation of the cylinder deactivation solenoid.

🔍 Step 3: Inspect Wiring and Connectors

🔧 Locate the electrical harnesses and connectors related to the deactivation solenoid.
✔️ Look for damaged, melted, or corroded wires.
✔️ Clean the connectors with electrical contact spray and apply dielectric grease.

🔍 Step 4: Test the Cylinder Deactivation Solenoid

🛠️ Use a digital multimeter (DVOM) to test the solenoid’s resistance.
✔️ Compare the reading with the manufacturer’s specifications.
✔️ Faulty solenoid? → Replace it.

🔍 Step 5: Check Oil Passages

🚗 Deposits can clog oil passages, affecting the solenoid’s operation.
✔️ Clean the oil passages if necessary.

🔍 Step 6: Clear the Code and Test

✔️ After repairs, use an OBD2 scanner to clear the P3429 code.
✔️ Start the engine and drive to check if the issue is resolved.

---

5. Common Repairs for Code P3429

🔧 Here are the most frequently performed repairs:
✅ Replacing the cylinder deactivation solenoid
✅ Cleaning connectors and repairing wiring
✅ Oil change and filter replacement
✅ Cleaning blocked oil passages
✅ Replacing the ECM (rare)

---

6. Common Mistake to Avoid

⚠️ Do not immediately replace the deactivation solenoid without checking:
✔️ The engine oil level and quality
✔️ The condition of electrical harnesses and connectors
✔️ The cleanliness of oil passages

---

7. Conclusion

Code P3429 is often related to a faulty deactivation solenoid or an engine oil issue. Prompt action can prevent costly engine repairs.

🚗 If the problem persists, consult a qualified mechanic for a thorough diagnosis.

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 P3428 trouble code may include:

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

What are some common causes of the code?

Causes

of this P3428 code may include:

• Faulty cylinder deactivation 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 P3428?

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. In some circumstances, this can save you considerable time in the long run by pointing you in the right direction.

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 4 deactivation intake valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components, including the deactivation 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. This process should include all wiring connectors and connections to all components, including the ECM. Consult vehicle-specific technical data to verify the configuration of the cylinder 4 deactivation/intake valve control circuit and confirm each component incorporated in the circuit that may include a fuse or fusible link.

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.

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?

• Replacing the deactivation solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Changing oil and filter
• Cleaning blocked oil passages
• Replacing the ECM

Common Mistake

Replacing the deactivation 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 the cylinder 4 deactivation/intake valve control circuit error code. This article is strictly informational, and 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 P3427 trouble code may include:

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

What are some common causes of the code?

Causes

of this P3427 code may include:

• Faulty cylinder deactivation 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 P3427?

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. In some circumstances, this can save you considerable time in the long run by pointing you in the right direction.

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 4 deactivation intake valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components, including the deactivation 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. This process should include all wiring connectors and connections to all components, including the ECM. Consult vehicle-specific technical data to verify the configuration of the cylinder 4 deactivation/intake valve control circuit and confirm each component incorporated in the circuit that may include a fuse or fusible link.

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.

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 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 common repairs for this code?

• Replacing the deactivation solenoid
• Cleaning corrosion from connectors
• Repairing or replacing faulty wiring
• Changing oil and filter
• Cleaning blocked oil passages
• Replacing the ECM

Common Mistake

Replacing the deactivation 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 the cylinder 4 deactivation/intake valve control circuit error code. This article is strictly informational, and 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 P3426 trouble code may include:

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

What are some common causes of the code?

Causes

of this P3426 code may include:

• Faulty cylinder deactivation 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 P3426?

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. In some circumstances, this can save you significant time in the long run by pointing you in the right direction.

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 4 deactivation intake valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components, including the deactivation 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. This process should include all wiring connectors and connections to all components, including the ECM. Consult vehicle-specific technical data to verify the configuration of the cylinder 4 deactivation/intake valve control circuit and confirm each component incorporated in the circuit that may include a fuse or fusible link.

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.

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 indicates faulty wiring that is open, shorted, or corroded and should be repaired or replaced.

What are common repairs for this code?

• Replacing the deactivation solenoid
• Cleaning connector corrosion
• Repairing or replacing faulty wiring
• Changing oil and filter
• Cleaning blocked oil passages
• Replacing the ECM

Common Mistake

Replacing the deactivation 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 the cylinder 4 deactivation/intake 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 of the symptoms of the code?

Symptoms of a P3432 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 P3432 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 P3432?

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 4 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 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 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 P3431 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 P3431 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 P3431?

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 4 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 the associated wiring shows no obvious defects such as scraping, rubbing, bare wires, or burns. Then check connectors and connections for security, corrosion, and damaged pins. Consult specific vehicle technical data to verify configuration and identify each component incorporated in 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 must 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 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 malfunction symptoms. 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 P3430 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 P3430 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 P3430?

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 problem.

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 4 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 associated wiring doesn’t show obvious defects such as scraping, rubbing, bare wires, or burns. Then check connectors and connections for security, corrosion, and damaged pins. Consult specific vehicle technical data to verify configuration and identify each component incorporated in 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 power source or ground, continuity tests may be required to verify wiring, connector, and other component integrity. 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 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 P3436 trouble code may include:

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

What are some common causes of the code?

Causes

of this P3436 code may include:

• Faulty cylinder deactivation 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 P3436?

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. Under certain circumstances, this can save you considerable time in the long run by pointing you in the right direction.

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 5 deactivation intake valve control circuit and look for obvious physical damage. Based on the specific vehicle, this circuit may incorporate multiple components including the deactivation solenoid, switches, fault indicators, and ECM. Perform a thorough visual inspection to verify that 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. This process should include all wiring connectors and connections to all components including the ECM. Consult vehicle-specific technical data to verify the configuration of the cylinder 5 deactivation/intake control circuit and confirm each component incorporated in the circuit which may include a fuse or fusible link.

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.

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 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?

• Replacing deactivation solenoid
• Cleaning connector corrosion
• Repairing or replacing faulty wiring
• Changing oil and filter
• Cleaning blocked oil passages
• Flashing or replacing ECM

Common Mistake

• Replacing the deactivation 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 cylinder 5 deactivation/intake valve control circuit fault code. This article is strictly informational and vehicle-specific technical data and service bulletins should always take priority…