U0063
Vehicle Communication Bus D (-) shorted to Bus D (+)
U0063 is an OBD-II diagnostic trouble code meaning: Vehicle Communication Bus D (-) shorted to Bus D (+). Common causes: damage to the can bus wiring harness, short circuit in one of the modules. Estimated repair cost: $6–56.
Symptoms
- Unstable engine operation
- Failure of various vehicle systems
- The Check Engine light comes on
- Problems with diagnostics via OBD-II
- Malfunctions of electronic systems
Causes
- Damage to the CAN bus wiring harness
- Short circuit in one of the modules
- Damaged or oxidized connectors
- Grounding problems
- ECU malfunction
How to Fix
- Check the integrity of the CAN bus wiring harness
- Inspect connectors for damage or oxidation
- Check grounding
- Diagnose modules connected to the CAN bus
- Replace damaged wires or connectors
Related codes
Error U0063 by Vehicle Brand
FAQ
What does the U0063 code mean?
U0063 is an OBD-II diagnostic trouble code that indicates: Vehicle Communication Bus D (-) shorted to Bus D (+)
What causes a U0063 error code?
The most common causes of U0063 include: Damage to the CAN bus wiring harness; Short circuit in one of the modules; Damaged or oxidized connectors; Grounding problems.
How do I fix a U0063 diagnostic trouble code?
To fix U0063: Check the integrity of the CAN bus wiring harness. Inspect connectors for damage or oxidation. Check grounding. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0063?
Do not drive — repair immediately
How much does it cost to fix U0063?
The estimated repair cost for U0063 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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