VOLVO
ECM-940D - Accelerator pedal (AP) position sensor, analog signal. Signal too low
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:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (14)
- Volvo S60 (2001–2009)2005–2006Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo S60 (2001–2009)2007Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo S60 (2001–2009)2008–2009Engine B5204T5, B5244T5, B5254T2 only
- Volvo S80 (1999–2006)2005–2006Engine B5204T5, B5244T4, B5254T2, B6294S2, B6294T only
- Volvo V70 (2000–2008)2005Engine B5204T5, B5244T4, B5244T5, B5254T2, B5254T4 only
- Volvo V70 (2000–2008)2006–2007Engine B5204T5, B5244T5, B5254T2, B5254T4 only
- Volvo V70 (2000–2008)2008Engine B5254T2 only
- Volvo V70 XC / XC70 (2001–2007)2005All engines except: D5244T
- Volvo V70 XC / XC70 (2001–2007)2006Engine B5244T4, B5254T2 only
- Volvo V70 XC / XC70 (2001–2007)2007Engine B5254T2 only
- Volvo XC90 (2003–)2005–2006Engine B5254T2, B6294T only
- Volvo XC90 (2003–)2007–2012Engine B5254T2 only
- Volvo XC90 (2003–)2013–2014Engine B5254T9 only
- Volvo XC90 (2003–)2015
What does this fault code mean?
The code concerns the analog signal from the accelerator pedal sensor, which is too low. The ECM sets it when it registers the fault. The cause may be contact resistance, a broken ground lead, a short to ground, or a damaged sensor. The accelerator pedal can be disabled when the brake is pressed.
Possible causes
- Contact resistance or oxidation at the ECM and accelerator sensor connections
- Broken ground lead for the analog signal
- Broken wire, or a short to ground, in the signal cable
- Damaged accelerator pedal sensor
What you can do
- 1Check the accelerator pedal sensor connector for contact resistance and oxidation, and that it is secure
- 2Use a multimeter to check that the analog ground lead and signal cable from the sensor have no break and are not shorted to ground
- 3If you have a diagnostic tool: read the accelerator pedal movement in live data while the pedal is pressed slowly and released. The value should follow the pedal
- 4Check that the fuses are intact. Their locations are in the handbook or on the fuse box cover
- 5The accelerator can be disabled when the brake is pressed, which is a safety matter. Have a workshop check the fault at once and do not keep driving with it
Symptoms you may notice1
- Poor accelerator pedal response
What the fault can affect1
- The accelerator pedal is disabled when the brake is pressed
General guidance for car owners. Diagnosis on the car can point to a different cause.