U0167
Lost Communication With Vehicle Immobilizer Control Module
Severity: HIGH
Symptoms
- Check Engine light comes on
- Problems starting the engine
- The car may not start
- The immobilizer may block engine operation
- Possible malfunctions of the anti-theft system
Causes
- Broken or damaged wires between the ECU and the immobilizer module
- Immobilizer module malfunction
- Immobilizer module power supply problems
- Software failure in the ECU
- Corrosion of contacts or connectors
How to Fix
- Check the integrity of the wiring between the ECU and the immobilizer module
- Check the power and ground of the immobilizer module
- Inspect connectors for corrosion or damage
- Scan the system for other errors
- If necessary, replace the immobilizer module
- Repair only from an authorized dealer