VOLVO
ECM-P012038 - Throttle/Pedal Position Sensor A Circuit. FM (Frequency Modulated) / PWM (Pulse Width Modulated) Failures. Signal frequency incorrect
System
Engine Control Module (ECM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (12)
- Volvo S60 (2011–)2011–2014Engine B6304T4 only
- Volvo S60 (2011–)2015Engine B6304T3, B6304T4, B6304T5 only
- Volvo S80 (2007–)2007Engine B6324S, B8444S only
- Volvo S80 (2007–)2008–2009Engine B6304T2, B6324S, B8444S only
- Volvo V60 (2011–)2011–2014Engine B6304T4 only
- Volvo V60 (2011–)2015Engine B6304T3, B6304T4, B6304T5 only
- Volvo V70 (2008–)2008–2009Engine B6304T2, B6324S only
- Volvo XC60 (2009–)2009–2010Engine B6304T2 only
- Volvo XC60 (2009–)2011–2015Engine B6304T4 only
- Volvo XC70 (2008–)2008Engine B6324S only
- Volvo XC70 (2008–)2009Engine B6304T2, B6324S only
- Volvo XC90 (2003–)2007–2010Engine B6324S only
What does this fault code mean?
The control module checks the PWM signal from the accelerator pedal position sensor. The fault code is set when the signal frequency is incorrect.
Possible causes
- Loose or high-resistance connections on the PWM signal wire
- Interference on the PWM signal cable
- Damaged accelerator pedal position sensor
What you can do
- 1Read the fault code status with the ignition on. Check that the fault is not active when the test is finished, then clear the code
- 2Check the PWM signal wiring at the pedal and at the control module: the connections should be firmly seated and free from contact resistance
- 3Check whether anything could disturb the wire, such as chafing or running close to live cables
- 4If the connections are in order and the fault remains, have a workshop check or replace the accelerator pedal position sensor
Symptoms you may notice2
- A message is shown in the information display
- The accelerator pedal is ignored during braking
What the fault can affect2
- The control module uses the analogue signal via CAN instead
- If the brake is pressed at the same time, the pedal position used is the released position
General guidance for car owners. Diagnosis on the car can point to a different cause.