VOLVO
ECM-U011187 - Lost Communication With Battery Energy Control Module "A". Bus Signal / Message Failures. Missing message
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V70 (2008–), XC60 (2009–)
Show models by year and engine (20)
- Volvo S60 (2011–)2011Engine B4164T, B4164T3, B4204T6, B4204T7 only
- Volvo S60 (2011–)2012–2014Engine B4164T, B4164T2, B4164T3, B4204T7 only
- Volvo S60 (2011–)2015Engine B4164T, B4164T2, B4164T3 only
- Volvo S80 (2007–)2010Engine B4204T6 only
- Volvo S80 (2007–)2011Engine B4164T, B4204T6, B4204T7 only
- Volvo S80 (2007–)2012–2014Engine B4164T, B4164T2, B4204T6, B4204T7 only
- Volvo S80 (2007–)2015Engine B4164T only
- Volvo V40 (2013–)2013Engine B4164T, B4164T3 only
- Volvo V40 (2013–)2014–2015Engine B4164T, B4164T3, B4164T4 only
- Volvo V40 Cross Country (2013–)2013–2015Engine B4164T only
- Volvo V60 (2011–)2011Engine B4164T, B4164T3, B4204T6, B4204T7 only
- Volvo V60 (2011–)2012–2014Engine B4164T, B4164T2, B4164T3, B4204T7 only
- Volvo V60 (2011–)2015Engine B4164T, B4164T2, B4164T3 only
- Volvo V70 (2008–)2010Engine B4204T6 only
- Volvo V70 (2008–)2011Engine B4164T, B4204T6, B4204T7 only
- Volvo V70 (2008–)2012–2014Engine B4164T, B4164T2, B4204T7 only
- Volvo V70 (2008–)2015Engine B4164T, B4164T2 only
- Volvo XC60 (2009–)2010Engine B4204T6 only
- Volvo XC60 (2009–)2011–2012Engine B4204T6, B4204T7 only
- Volvo XC60 (2009–)2013–2015Engine B4204T7 only
What does this fault code mean?
The engine control module (ECM) keeps waiting for a message from the central electronics control module (CEM) over the CAN network. The code is set when the engine control module detects faulty CAN communication, for example when an expected message does not arrive. Although the code is titled lost communication with the battery energy control module “A”, it concerns the message from the central electronics control module.
Possible causes
- Fault in the central electronics control module (CEM), which sends the messages
- Break in one or both CAN wires, so the message does not reach the engine control module
- Intermittent short circuits between the CAN wires, or between a CAN wire and ground or supply voltage
- The sending control module has stopped sending the message
- Incorrect signal configuration after a control module was replaced without new software being loaded
What you can do
- 1Read the codes in the engine control module and first fix any other CAN-related codes, as they may share the same cause
- 2Clear the code and road test the car. If it is set again the fault is probably intermittent
- 3Check that the connectors on the CAN wires are secure and clean
- 4Use a multimeter to check that the CAN wires have no break and are not shorted to ground or supply voltage
- 5Check that the battery has good voltage and that the fuses are intact
- 6If the fault returns: have a workshop with diagnostic equipment check the central electronics control module. Do not work on the battery system yourself
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.