P206D Possible Causes

• Faulty Reductant Quality Sensor
• Reductant Quality Sensor harness is open or shorted
• Poor electrical connection in Reductant Quality Sensor circuit

What Does It Mean?

How to Fix Code P206D

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.

P206D Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P206D Meaning

Reductant Quality Sensor Circuit High is the generic description for code P206D, but the manufacturer may have a different description

How severe is this DTC?

An IMT system failure could impair energy efficiency and, in rare cases, cause hardware to enter a combustion chamber. The conditions that led to storing a P206E code must be corrected as soon as possible.

What are some of the symptoms of the code?

Symptoms of a P206E fault code may include:

• Reduced energy efficiency
• Reduced engine performance
• Lean or rich exhaust codes
• No symptoms may be apparent

What are some common causes of the code?

Causes of this code may include:

• Stuck or loose IMT flaps
• Faulty IMT actuator (valve)
• Vacuum leak
• Open or shorted wiring or connectors
• Faulty PCM or PCM programming error

What are the troubleshooting steps for P206E?

A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a source of vehicle-specific diagnostic information will be needed to diagnose a P206E code.

You can use your vehicle information source to locate a technical service bulletin (TSB) that matches the vehicle’s year, make, and model; as well as engine size, stored codes, and presented symptoms. If you find one, it may provide useful diagnostic information.

Use the scanner (connected to the vehicle’s diagnostic connector) to retrieve all stored codes and relevant freeze frame data. It’s a good idea to note this information before clearing the codes, then test the vehicle until the PCM enters readiness mode or the code resets.

If the PCM enters readiness mode at that point, the code is intermittent and may be much harder to diagnose. If so, the conditions that contributed to storing the code may need to worsen before an accurate diagnosis can be made.

If the code immediately resets, the next step in your diagnosis will require you to search your vehicle information source for diagnostic flowcharts, connector pinout diagrams, connector face views, and component testing procedures/specifications.

Step 1

Use your vehicle diagnostic information source and the DVOM to test the voltage, ground, and signal circuits at the appropriate IMT valve.

Step 2

Use the DVOM to test the appropriate IMT valve according to manufacturer specifications. Components that do not test within the maximum allowable parameters should be considered faulty.

Step 3

If the IMT valve is functional, use the DVOM to test the input and output signal circuits from the fuse panel and PCM. Disconnect all controllers before using the DVOM for testing.

Failed IMT valves, linkages, and rings are typically the cause of IMT-related codes.

How severe is this DTC?

A failure in the IMT system could affect energy efficiency and, in rare cases, lead to hardware entering a combustion chamber. The conditions that led to storing a P206F code should be corrected as soon as possible.

What are some of the symptoms of the code?

Symptoms of a P206F fault code may include:

• Reduced energy efficiency
• Decreased engine performance
• Lean or rich exhaust codes
• No symptoms may be apparent

What are some common causes of the code?

Causes of this code may include:

• Stuck or loose IMT flaps
• Faulty IMT actuator (valve)
• Vacuum leak
• Open or shorted wiring or connectors
• Faulty PCM or PCM programming error

What are the troubleshooting steps for P206F?

A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a source of vehicle-specific diagnostic information will be needed to diagnose a P206F code.

You can use your vehicle information source to locate a technical service bulletin (TSB) that matches the vehicle’s year, make, and model, as well as the engine size, stored codes, and symptoms presented. If you find one, it may provide useful diagnostic information.

Use the scanner (connected to the vehicle’s diagnostic connector) to retrieve all stored codes and relevant freeze frame data. It’s a good idea to note this information before clearing the codes, then test the vehicle until the PCM enters readiness mode or the code resets.

If the PCM enters readiness mode at this point, the code is intermittent and may be much harder to diagnose. If this is the case, the conditions that contributed to storing the code may need to worsen before an accurate diagnosis can be made.

If the code is immediately reset, the next step in your diagnosis will require you to search your vehicle information source for diagnostic flowcharts, connector pinout diagrams, connector face views, and component testing procedures/specifications.

Step 1

Use your vehicle diagnostic information source and the DVOM to test the voltage, ground, and signal circuits at the appropriate IMT valve.

Step 2

Use the DVOM to test the appropriate IMT valve according to the manufacturer’s specifications. Components that do not test within the maximum allowable parameters should be considered faulty.

Step 3

If the IMT valve is functional, use the DVOM to test the input and output signal circuits from the fuse panel and PCM. Disconnect all controllers before using the DVOM for testing.

Failed IMT valves, linkages, and rings are typically the cause of IMT-related codes.

How severe is this DTC?

An IMT system failure could impair energy efficiency and, in rare cases, cause hardware to enter a combustion chamber. The conditions that led to storing a P2070 code must be corrected as soon as possible.

What are some symptoms of the code?

Symptoms of a P2070 fault code may include:

• Reduced energy efficiency
• Reduced engine performance
• Lean or rich exhaust codes
• No symptoms may be apparent

What are some common causes of the code?

Causes

of this code may include:

• Stuck or loose IMT flaps
• Faulty IMT actuator (valve)
• Vacuum leak
• Open or shorted wiring or connectors
• Faulty PCM or PCM programming error

What are the troubleshooting steps for P2070?

A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a source of vehicle-specific diagnostic information will be needed to diagnose a P2070 code.

You can use your vehicle information source to locate a technical service bulletin (TSB) that matches the vehicle’s year, make, and model; as well as engine size, stored codes, and presented symptoms. If you find one, it may provide useful diagnostic information.

Use the scanner (connected to the vehicle’s diagnostic connector) to retrieve all stored codes and relevant freeze frame data. It’s a good idea to note this information before clearing the codes, then test the vehicle until the PCM enters readiness mode or the code resets.

If the PCM enters readiness mode at that point, the code is intermittent and may be much harder to diagnose. If this is the case, the conditions that contributed to storing the code may need to worsen before an accurate diagnosis can be made.

If the code is immediately reset, the next step in your diagnosis will require you to search your vehicle information source for diagnostic flowcharts, connector pinout diagrams, connector face views, and component testing procedures/specifications.

Step 1

Use your vehicle diagnostic information source and the DVOM to test the voltage, ground, and signal circuits at the appropriate IMT valve.

Step 2

Use the DVOM to test the appropriate IMT valve according to manufacturer specifications. Components that do not test within the maximum allowable parameters should be considered faulty.

Step 3

If the IMT valve is functional, use the DVOM to test the input and output signal circuits from the fuse panel and PCM. Disconnect all controllers before using the DVOM for testing.

Failed IMT valves, linkages, and rings are typically the cause of IMT-related codes.

How severe is this DTC?

An IMT system failure could impair energy efficiency and, in rare cases, draw hardware into a combustion chamber. The conditions that led to storing a P2071 code must be corrected as soon as possible.

What are some of the symptoms of the code?

Symptoms of a P2071 fault code may include:

• Reduced energy efficiency
• Reduced engine performance
• Lean or rich exhaust codes
• No symptoms may be apparent

What are some common causes of the code?

Causes of this code may include:

• Stuck or loose IMT flaps
• Faulty IMT actuator (valve)
• Vacuum leak
• Open or shorted wiring or connectors
• Faulty PCM or PCM programming error

What are the troubleshooting steps for P2071?

A diagnostic scanner, digital volt/ohmmeter (DVOM), and vehicle-specific diagnostic information source will be needed to diagnose a P2071 code.

You can use your vehicle information source to locate a technical service bulletin (TSB) that matches the vehicle’s year, make, and model; as well as engine size, stored codes, and presented symptoms. If you find one, it may provide helpful diagnostic information.

Use the scanner (connected to the vehicle’s diagnostic connector) to retrieve all stored codes and relevant freeze frame data. It’s a good idea to record this information before clearing the codes, then test the vehicle until the PCM enters readiness mode or the code resets.

If the PCM enters readiness mode at that point, the code is intermittent and may be much harder to diagnose. If so, the conditions that contributed to storing the code may need to worsen before an accurate diagnosis can be made.

If the code immediately resets, the next step in your diagnosis will require you to search your vehicle information source for diagnostic flowcharts, connector pinout diagrams, connector face views, and component testing procedures/specifications.

Step 1

Use your vehicle diagnostic information source and the DVOM to test the voltage, ground, and signal circuits at the appropriate IMT valve.

Step 2

Use the DVOM to test the appropriate IMT valve according to manufacturer specifications. Components that test outside the maximum allowable parameters should be considered faulty.

Step 3

If the IMT valve is functional, use the DVOM to test the input and output signal circuits from the fuse panel and PCM. Disconnect all controllers before using the DVOM for testing.

Failed IMT valves, linkages, and rings are typically the cause of IMT-related codes.

P2072 Possible Causes

Ice or oil in the intake air system could be the result of a positive crankcase ventilation (PCV) system concern.

What Does It Mean?

How to Fix Code P2072

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2072

Symptoms

Possible

Check Engine Light on (or Service Engine Soon warning light)

P2072 Meaning

The P2072 code only identifies that the strategy has performed multiple opening and closing cycles to eliminate potential ice accumulation. This code does not imply any system concern, only that the mode has occurred and this mode may cause long starting times…

P2073 – Manifold Absolute Pressure / Mass Air Flow – Throttle Position Correlation at Idle

P2073 Possible Causes

• Large vacuum leak in the engine
• Faulty Manifold Absolute Pressure (MAP) sensor
• Faulty Throttle Position Sensor (TPS)
• Faulty Engine Control Module (ECM)

What Does It Mean?

How to Fix Code P2073

Check the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2073 Symptoms

Possible

Engine light on (or service engine soon warning light)

P2073 Meaning

The Engine Control Module (ECM) detected a faulty signal correlation between the Manifold Absolute Pressure (MAP) and the Throttle Position Sensor (TPS)

P2074 – Manifold Absolute Pressure / Mass Air Flow – Throttle Position Correlation at Higher Load

P2074 Possible Causes

• Large vacuum leak in the engine
• Faulty Manifold Absolute Pressure (MAP) sensor
• Faulty Throttle Position Sensor (TPS)
• Faulty Engine Control Module (ECM)

What Does It Mean?

How to Fix Code P2074

Check the “possible causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2074 Symptoms

Possible

Engine light on (or service engine soon warning light)

P2074 Meaning

The Engine Control Module (ECM) detected a faulty signal correlation between the Manifold Absolute Pressure (MAP) and the Throttle Position Sensor (TPS)

P2075 Possible Causes

• Faulty intake manifold tuning valve position sensor/switch
• Intake manifold tuning valve position sensor/switch harness is open or shorted
• Poor electrical connection in intake manifold tuning valve position sensor/switch circuit
• Faulty intake manifold tuning valve (IMTV)
• Faulty intake manifold runner control (IMRC)
• Faulty powertrain control module (PCM)

What Does It Mean?

How to Fix Code P2075

Check the “possible causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2075 Possible Symptoms

Illuminated engine light (or service engine soon warning light)

P2075 Meaning

The intake manifold tuning valve (IMTV) is a motorized actuator unit mounted directly on the intake manifold. The IMTV actuator controls a shutter attached to the actuator shaft. There is no monitor input to the powertrain control module (PCM) with this system to indicate the shutter position.

The motorized IMTV unit will not be powered below approximately 2600 RPM or higher on some vehicles. The shutter will be in the closed position preventing the air flow mixture from occurring in the intake manifold. Above approximately 2600 RPM or higher, the motorized unit will be powered. The motorized unit will be controlled by the PCM initially at a 100% duty cycle to move the shutter to the open position, then will drop to approximately 50% to continue holding the shutter open.

The IMTV (Intake Manifold Tuning Valve) system is monitored for failure during continuous self-tests, Key ON Engine OFF (KOEO) or Key ON Engine Running (KOER). The test fails when the signal is above or below an expected calibrated range.

P2076 Possible Causes

• Faulty intake manifold tuning valve position sensor/switch
• Intake manifold tuning valve position sensor/switch harness is open or shorted
• Poor electrical connection in intake manifold tuning valve position sensor/switch circuit
• Faulty intake manifold tuning valve (IMTV)
• Faulty intake manifold runner control (IMRC)
• Faulty powertrain control module (PCM)

What Does It Mean?

How to Fix Code P2076

Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.

P2076 Possible Symptoms

Check engine light on (or service engine soon warning light)

P2076 Meaning

The intake manifold tuning valve (IMTV) is a motorized actuator unit mounted directly on the intake manifold. The IMTV actuator controls a shutter attached to the actuator shaft. There is no monitor input to the powertrain control module (PCM) with this system to indicate the shutter position.

The motorized IMTV unit will not be powered below approximately 2600 RPM or higher on some vehicles. The shutter will be in the closed position, preventing the air flow mixture from occurring in the intake manifold. Above approximately 2600 RPM or higher, the motorized unit will be powered. The motorized unit will be controlled by the PCM initially at a 100% duty cycle to move the shutter to the open position, then will drop to approximately 50% to continue maintaining the shutter open.

The IMTV (Intake Manifold Tuning Valve) system is monitored for failure during continuous self-tests, Key ON Engine OFF (KOEO), or Key ON Engine Running (KOER). The test fails when the signal is above or below an expected calibrated range.