Lost Communication With Immobilizer Control Module
What does U0167 mean?
The U0167 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Immobilizer Control Module. This is a critical severity code.
Common Symptoms
- Vehicle will not start
- Security or immobilizer warning light on
- Key not recognized message on dashboard
- Engine cranks but will not fire
- Anti-theft indicator flashing
Probable Causes (Ranked by Likelihood)
- Failed immobilizer control module Very High
- Damaged key transponder or key fob High
- Wiring fault between immobilizer and ECM Moderate
- Antenna ring around ignition cylinder failed Moderate
Step-by-Step Diagnostic Procedure
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Try a second programmed key to rule out key transponder failure
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Check for power and ground at the immobilizer module
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Inspect the antenna ring around the ignition cylinder
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Verify CAN bus communication between the immobilizer and ECM
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Check the key transponder signal with a scan tool
Frequently Asked Questions
Can I drive with code U0167?
No, the vehicle typically will not start when the immobilizer module loses communication. The engine is locked out as a security measure.
What causes U0167?
Most commonly a failed immobilizer module or a damaged key transponder. The antenna ring that reads the key chip can also fail over time.
Is U0167 expensive to fix?
Costs range from $200 for a new key to $900 for module replacement and programming. Dealer programming is typically required.