VOLVO
ECM-U010300 - Lost Communication With Gear Shift Control Module A. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
8 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (9)
- Volvo S60 (2011–)2011–2012Engine B5254T5 only
- Volvo S60 (2011–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo S80 (2007–)2014–2015Engine B4204T11, B4204T12, B4204T15, D4204T5 only
- Volvo V40 (2013–)2015Engine B4204T11, D4204T14 only
- Volvo V40 Cross Country (2013–)2015Engine B4204T11, D4204T14 only
- Volvo V60 (2011–)2014–2015Engine B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo V70 (2008–)2014–2015Engine B4204T11, D4204T5 only
- Volvo XC60 (2009–)2014–2015Engine B4204T10, B4204T11, B4204T12, B4204T15, B4204T9, D4204T5 only
- Volvo XC70 (2008–)2014–2015Engine B4204T11, D4204T5 only
What does this fault code mean?
The engine control module (ECM) checks the P and N positions of the gear selector using signals from the transmission control module (TCM) on the CAN network. The code is set when the P and N signal is missing or incorrect, or when the TCM can no longer reach the ECM.
Possible causes
- Faulty CAN communication
- Open circuit or short circuit in the signal wire
What you can do
- 1Read the code with a diagnostic tool and check whether it is active or only stored
- 2Check that the connectors to the engine control module and the transmission control module are secure and clean
- 3Use a multimeter to check that the signal wire between the engine control module and the transmission control module has no break or short circuit
- 4If you have a diagnostic tool: read the codes in the transmission control module and see whether they also show communication faults
- 5Have a workshop check the CAN communication and the gear selector if the fault remains
Symptoms you may notice4
- Check engine light comes on or behaves abnormally
- Cruise control does not engage
- Cruise control does not hold the set speed and disengages
- Auto start does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.