Lost Communication With Immobilizer Control Module
The U0167 code means the vehicle's onboard diagnostic system has detected: Lost Communication With Immobilizer Control Module. This is a critical severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- hard
- Estimated cost
- $200 - $900 (parts and labor)
Network codes mean modules are not communicating. You need a scanner that reads all systems to find the problem.
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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
-
Try a second programmed key to rule out key transponder failure
-
Check for power and ground at the immobilizer module
-
Inspect the antenna ring around the ignition cylinder
-
Verify CAN bus communication between the immobilizer and ECM
-
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.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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