VOLVO
ECM-941F - Brake pedal position. Faulty signal
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 modelsC70 Cabriolet (1998–2005), C70 Coupé (1998–2002), S60 (2001–2009), S70 (1997–2000), S80 (1999–2006), V70 (1997–2000), V70 (2000–2008)
Show models by year and engine (11)
- Volvo C70 Cabriolet (1998–2005)2000Engine B5244S only
- Volvo C70 Coupé (1998–2002)1999Engine B5254S DENSO only
- Volvo C70 Coupé (1998–2002)2000Engine B5244S only
- Volvo S60 (2001–2009)2001Engine B5244S, B5244S2 only
- Volvo S70 (1997–2000)1999Engine B5254S DENSO only
- Volvo S70 (1997–2000)2000Engine B5244S, B5244S2, B5244SG, B5244SG2 only
- Volvo S80 (1999–2006)1999–2000Engine B5244S, B5244S2 only
- Volvo S80 (1999–2006)2001Engine B5244S, B5244S2, B5244SG only
- Volvo V70 (1997–2000)1999Engine B5254S DENSO only
- Volvo V70 (1997–2000)2000Engine B5244S, B5244S2, B5244SG, B5244SG2 only
- Volvo V70 (2000–2008)2001Engine B5244S, B5244S2, B5244SG only
What does this fault code mean?
The brake pedal position from the sensor and the brake light switch state do not agree. The ECM sets the code when the switch does not close while the pedal is pressed, and the sensor shows a high position for a longer time. The cause may be a break in the signal wire, or a damaged or misadjusted brake light switch.
Possible causes
- Break in the signal wire
- Damaged brake light switch
- Brake light switch misadjusted
What you can do
- 1Read the fault codes in the ECM and deal first with any codes for the brake pedal sensor or the brake light switch
- 2Check that the switch and the sensor at the pedal are secure, and that the pedal mounting looks sound
- 3Use a multimeter to check that the wire from the brake light switch is not broken
- 4If you have a diagnostic tool: compare the brake pedal position in live data with the pedal released and with it pressed. The difference should be clear
- 5The brake system is safety-critical. If the fault remains, have a workshop check it, and do not drive with a safety fault in the brakes
Symptoms you may notice3
- ETS warning lamp on
- Cruise control does not function at all
- Brake light constantly on
What the fault can affect2
- Cruise control is off for the driving cycle in which the fault was detected
- Function returns at the next start, if the fault is no longer there
General guidance for car owners. Diagnosis on the car can point to a different cause.