VOLVO
ECM-P032488 - Knock Control System Error. Bus Signal / Message Failures. Bus off
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 engine control module (ECM) filters the signal from the knock sensor. If the control module has an internal fault in the knock control filter, the fault code is stored. The fault therefore lies in the control module, not in the wiring or the sensor, and it affects performance and ignition timing.
Possible causes
- Damaged engine control module (ECM)
What you can do
- 1Read the fault code and clear it; drive the car and see whether the fault returns
- 2Check the fuses and the battery voltage, since a poor supply can give faulty signals
- 3Have a workshop with diagnostic equipment check the engine control module and replace it if needed
Symptoms you may notice2
- Reduced performance
- The emissions warning light lights up
What the fault can affect1
- Ignition timing is retarded as a safety measure
General guidance for car owners. Diagnosis on the car can point to a different cause.