VOLVO
IGM-U002888 - Vehicle Communication Bus A. Bus Signal / Message Failures. Bus off
System
Unknown System / Manufacturer Specific
Volvo models this fault code applies to
Applies to the following models:
1 modelV60 (2011–)
Show models by year and engine (2)
What does this fault code mean?
The high voltage generator control module (IGM) sends or receives faulty messages on the sensor CAN, or has lost contact with the sensor CAN. The module then shuts down its communication on the bus. The fault is only checked once the test has started at ignition on.
Possible causes
- Open circuit on one or both cables to the sensor CAN
- Software fault in the IGM
- Internal fault inside the ISC voltage converter
What you can do
- 1Read out, clear the code and start the car to see whether it returns
- 2Have a workshop check that the connectors on the sensor CAN are fully engaged and free from corrosion
- 3Have a workshop with diagnostic equipment locate where the break in the sensor CAN is
- 4The high voltage system may only be handled by a workshop; do not work on it yourself
Symptoms you may notice5
- Warning symbol and text message in the display
- Warning about power supply problems from the alternator and charge regulator
- Charging of the high voltage battery while driving is absent, reduced or not working correctly
- High voltage battery is discharged or charges poorly
- HYBRID drive mode: the combustion engine is active all the time or too often
What the fault can affect3
- The control module switches itself off on the sensor CAN (bus-off) and stays off until the power supply has been disconnected
- The high voltage battery cannot be charged by the combustion engine
- When the power supply is reconnected, the control module tries to communicate again
General guidance for car owners. Diagnosis on the car can point to a different cause.