U186B
Electronic Brake Control Module Lost Communication With Transmission Control Module
U186B is an OBD-II diagnostic trouble code meaning: Electronic Brake Control Module Lost Communication With Transmission Control Module. Common causes: broken or damaged can bus wires, poor contact in module connectors. Estimated repair cost: $56–278.
Symptoms
- Check Engine Light Is On
- Possible problems with gear shifting
- Disabling the stabilization system
- Errors in other modules
- Reduced vehicle dynamics
Causes
- Broken or damaged CAN bus wires
- Poor contact in module connectors
- Malfunction of the brake control module
- Transmission control module malfunction
- Problems with module power supply
How to Fix
- Check the integrity of the CAN bus between modules
- Inspect connectors and contacts for corrosion and damage
- Check power and ground of modules
- Scan all modules for other errors
- Replace the faulty module if necessary
Related codes
FAQ
What does the U186B code mean?
U186B is an OBD-II diagnostic trouble code that indicates: Electronic Brake Control Module Lost Communication With Transmission Control Module
What causes a U186B error code?
The most common causes of U186B include: Broken or damaged CAN bus wires; Poor contact in module connectors; Malfunction of the brake control module; Transmission control module malfunction.
How do I fix a U186B diagnostic trouble code?
To fix U186B: Check the integrity of the CAN bus between modules. Inspect connectors and contacts for corrosion and damage. Check power and ground of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U186B?
Yes, but get it checked soon
How much does it cost to fix U186B?
The estimated repair cost for U186B is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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