U1255
Lost Communications
U1255 is an OBD-II diagnostic trouble code meaning: Lost Communications. Common causes: broken or damaged can bus wires, poor contact in connectors. Estimated repair cost: $17–111.
Symptoms
- Check Engine Light Is On
- Disabling some vehicle systems
- Incorrect operation of the dashboard
- Problems starting the engine
- Errors in other systems
Causes
- Broken or damaged CAN bus wires
- Poor contact in connectors
- Malfunction of one of the electronic modules
- Short circuit in communication circuit
- Module software failure
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect and clean all connectors
- Check power and ground of modules
- Scan all modules for errors
- If necessary, replace the faulty module
Related codes
FAQ
What does the U1255 code mean?
U1255 is an OBD-II diagnostic trouble code that indicates: Lost Communications
What causes a U1255 error code?
The most common causes of U1255 include: Broken or damaged CAN bus wires; Poor contact in connectors; Malfunction of one of the electronic modules; Short circuit in communication circuit.
How do I fix a U1255 diagnostic trouble code?
To fix U1255: Check the integrity of the CAN bus wiring. Inspect and clean all connectors. Check power and ground of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1255?
Limited driving only, diagnose soon
How much does it cost to fix U1255?
The estimated repair cost for U1255 is $17–111. Actual cost depends on your vehicle, location, and labor rates.
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