VOLVO
ECM-P086300 - TCM Communication Circuit. General Failure Information. No sub type information
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 ECM has logged a fault on the CAN link between the TCM and itself. The fault may lie in a CAN wire that is broken or shorted, or in another control module on the same part of the CAN network. The eco lamp in the instrument panel may be lit.
Possible causes
- Break in one of the CAN wires
- Short circuit between the CAN wires
- Internal fault in the ECM itself
- Internal fault in another control module on the same part of the CAN network
What you can do
- 1Read the fault codes in the CEM and in other affected control modules first, as the CAN fault may also be set there
- 2This fault code should not be erased until the fault codes in the CEM and other affected modules have been remedied and erased
- 3Check that the fuses are intact. The locations are shown in the instruction manual or on the fuse list
- 4Use a multimeter to check that the CAN wires have no break and are not shorted to each other
- 5If the fault remains after these checks, have a workshop with diagnostic equipment investigate the CAN network and the control modules
Symptoms you may notice1
- The eco lamp is lit
General guidance for car owners. Diagnosis on the car can point to a different cause.