VOLVO
ECM-P050004 - Vehicle Speed Sensor A. General Failure Information. System Internal Failures
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsS60 (2011–), S80 (2007–), V70 (2008–)
Show models by year and engine (9)
- Volvo S60 (2011–)2011–2012Engine B5254T5 only
- Volvo S80 (2007–)2007–2008Engine B5254T6 only
- Volvo S80 (2007–)2009Engine B5254T6, B5254T8 only
- Volvo S80 (2007–)2010–2011Engine B5254T10, B5254T11, B5254T8 only
- Volvo S80 (2007–)2012Engine B5254T10 only
- Volvo V70 (2008–)2008Engine B5254T6 only
- Volvo V70 (2008–)2009Engine B5254T6, B5254T8 only
- Volvo V70 (2008–)2010–2011Engine B5254T10, B5254T11 only
- Volvo V70 (2008–)2012Engine B5254T10 only
What does this fault code mean?
The code concerns an internal system fault linked to the speed sensor. The brake control module (BCM) registers the fault on the speed signal, passes it on to the engine control module (ECM) and also stores a fault code of its own. The malfunction indicator lamp (MIL) may light up.
Possible causes
- Faulty speed input to the brake control module (BCM)
What you can do
- 1If you have a diagnostic tool, read the fault codes in the brake control module (BCM) and remedy them first
- 2With the diagnostic tool you can read the speed signal during a test drive and see whether it is steady
- 3Check that the fuses are intact. Their location is given in the owner's manual
- 4The brake system is safety-critical, so have a workshop check the wheel sensors and the brake control module. Do not work on the brake system yourself
- 5Clear the fault code only once the fault in the brake control module has been remedied, and road test
Symptoms you may notice1
- The malfunction indicator lamp (MIL) lights up
What the fault can affect1
- the brake module speed signal is replaced by a fixed value
General guidance for car owners. Diagnosis on the car can point to a different cause.