U0105high severityNetwork
Lost Communication with Fuel Injector Control Module
on 2009 Audi A3 2.0L TDI · FWD
What this code means
Cannot communicate with the fuel injector driver module, separate from the main ECM on some vehicles.
Symptoms
- Engine misfires
- Poor running
- Check Engine Light
- Reduced power
- Fuel injector faults
Common causes
- Injector driver module failure
- CAN bus wiring
- Module power loss
- Fuse blown
Diagnostic steps
- Check injector driver module fuse
- Test power and ground at module
- Check CAN wiring to module
- Try direct communication
- Check for related misfire codes
Repair notes
Check power supply to injector driver module. Common on diesel vehicles with separate injector controllers.
Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus