U18C5
Lost Communication With Electronic Brake Control Module On High Speed CAN Bus
U18C5 is an OBD-II diagnostic trouble code meaning: Lost Communication With Electronic Brake Control Module On High Speed CAN Bus. Common causes: broken or damaged can bus wires, brake control module malfunction. Estimated repair cost: $56–222.
Symptoms
- Check Engine Light Is On
- ABS and ESP systems do not work
- Loss of communication with other modules via the CAN bus
- Deterioration of the brake system
- Other related errors appear
Causes
- Broken or damaged CAN bus wires
- Brake control module malfunction
- Problems with power supply to the brake control module
- Short circuit in CAN circuit
- Problems with another module connected to the CAN bus
How to Fix
- Check the integrity of the CAN bus wires
- Check power and grounding of the brake control module
- Check the brake control module itself for faults
- Check other modules connected to the CAN bus
- Repair only from an authorized dealer
Related codes
FAQ
What does the U18C5 code mean?
U18C5 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Electronic Brake Control Module On High Speed CAN Bus
What causes a U18C5 error code?
The most common causes of U18C5 include: Broken or damaged CAN bus wires; Brake control module malfunction; Problems with power supply to the brake control module; Short circuit in CAN circuit.
How do I fix a U18C5 diagnostic trouble code?
To fix U18C5: Check the integrity of the CAN bus wires. Check power and grounding of the brake control module. Check the brake control module itself for faults. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U18C5?
Limited driving only, diagnose soon
How much does it cost to fix U18C5?
The estimated repair cost for U18C5 is $56–222. Actual cost depends on your vehicle, location, and labor rates.
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