U0167
NetworkModule Communicationhigh severityLost Communication with Immobilizer Control Module
What U0167 Means
Cannot communicate with the vehicle immobilizer/theft deterrent module.
Symptoms
- Vehicle will not start
- Security light flashing
- Key not recognized
- Immobilizer warning on
Common Causes
- Immobilizer module failure
- CAN bus wiring
- Module power loss
- Fuse blown
- Key transponder issue
- Antenna ring failure
Diagnostic Steps
- Check immobilizer module fuse
- Test power and ground
- Check CAN wiring
- Test key transponder signal
- Inspect antenna ring around ignition
- Check for correct key programming
Where to start: Security system. Check key transponder and antenna ring. May need key relearning procedure.
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