OBD-II Network Error Code U0167: How to Fix It

Medium 1-3 hours Critical Severity Verified June 2026
Error Code
U0167
Brand
OBD-II Network
Product Type
automotive
Severity
Critical
DIY Difficulty
Medium
Estimated Fix Time
1-3 hours
OBD-II error code U0167 indicates your vehicle's PCM (Powertrain Control Module) has lost communication with the immobilizer control module. This critical error can prevent your vehicle from starting and typically stems from wiring issues, faulty modules, or programming problems.
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Tools You'll Need

How to Fix Error Code U0167

  1. Verify the Error Code

    Ensure the vehicle is parked safely with the parking brake engaged before connecting diagnostic equipment.
  2. Check Battery Voltage

    Wear safety glasses and gloves when working around the battery. Remove jewelry to avoid short circuits.
  3. Inspect Immobilizer Module Fuses

  4. Examine Wiring Harnesses

    Disconnect the negative battery terminal before handling any electrical connections to prevent short circuits.
  5. Test Immobilizer Module Power and Ground

  6. Check CAN Bus Network Integrity

    Only perform this test with the ignition OFF and all modules connected to avoid damaging the CAN bus network.
  7. Attempt Module Reset

    This will reset radio presets and may require relearning procedures for some vehicle systems.
  8. Scan for Updated Codes

Parts You May Need

Immobilizer control module
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Automotive fuses
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Electrical connector pigtails
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Automotive wire and terminals
Check Price on Amazon
Immobilizer control module
Check Price on Amazon
Automotive fuses
Check Price on Amazon
Electrical connector pigtails
Check Price on Amazon
Automotive wire and terminals
Check Price on Amazon
Immobilizer control module
Check Price on Amazon
Automotive fuses
Check Price on Amazon
Electrical connector pigtails
Check Price on Amazon
Automotive wire and terminals
Check Price on Amazon
Immobilizer control module
Check Price on Amazon
Automotive fuses
Check Price on Amazon
Electrical connector pigtails
Check Price on Amazon
Automotive wire and terminals
Check Price on Amazon
Immobilizer control module
Check Price on Amazon
Automotive fuses
Check Price on Amazon
Electrical connector pigtails
Check Price on Amazon
Automotive wire and terminals
Check Price on Amazon
Immobilizer control module
Check Price on Amazon
Automotive fuses
Check Price on Amazon
Electrical connector pigtails
Check Price on Amazon
Automotive wire and terminals
Check Price on Amazon
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When to Call a Professional

If the immobilizer module needs replacement or reprogramming, contact a qualified automotive technician or dealership. These modules often require specialized programming tools and security procedures that are not available to DIY mechanics. Also seek professional help if you're uncomfortable working with electrical systems or if multiple communication codes are present.

Frequently Asked Questions

Can I drive my car with error code U0167?
You should not drive with code U0167 if it's preventing the vehicle from starting. If the car runs but shows this code, drive carefully to a repair facility as the immobilizer system may fail and leave you stranded.
What causes U0167 error code?
Common causes include damaged wiring between the PCM and immobilizer module, faulty immobilizer control module, blown fuses, low battery voltage, or CAN bus network problems.
How much does it cost to fix U0167?
Costs vary widely depending on the root cause. Simple fixes like fuses or wiring repairs may cost $50-200. Immobilizer module replacement can cost $300-800 including programming. Always get a proper diagnosis first.
Will disconnecting the battery fix U0167?
Sometimes a battery disconnect reset can clear temporary communication errors, but if the underlying problem (damaged wiring, faulty module) persists, the code will return.
Is U0167 the same as an anti-theft code?
Yes, U0167 is related to the anti-theft immobilizer system. It specifically indicates lost communication with the immobilizer control module, which is a key component of your vehicle's anti-theft protection.