VOLVO
ECM-P080588 - Clutch Position Sensor Circuit. 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 bus off fault means the control module has disconnected itself from the CAN bus after repeated communication errors. The code concerns communication between the central electronic module (CEM), which is connected to the clutch position sensor, and the engine control module (ECM). It is first set in the CEM and then in the engine control module as a knock-on fault, so the root cause is in the CEM.
Possible causes
- The root cause is in the central electronic module (CEM)
What you can do
- 1Check that the fuses are intact. The locations are shown in the instruction manual or on the fuse list
- 2Read the fault codes in the central electronic module (CEM) first, as the fault starts there
- 3Have a workshop with diagnostic equipment trace the fault code in the CEM and remedy the cause found there
- 4Erase the code in the engine control module only after the CEM fault code has been remedied and erased, as it cannot be erased before then
- 5After the repair, test auto-start and cruise control with the buttons and controls to confirm that they work again
Symptoms you may notice2
- Auto-start does not occur
- Cruise control does not work at all
General guidance for car owners. Diagnosis on the car can point to a different cause.