U0038
Vehicle Communication Bus B Performance
U0038 is an OBD-II diagnostic trouble code meaning: Vehicle Communication Bus B Performance. Common causes: open or short circuit in communication bus b, fault in one of the modules connected to the bus. Estimated repair cost: $6–56.
Symptoms
- Incorrect operation of electronic systems
- Check Engine Light Illuminates
- Lost connection with some modules
- Intermittent dashboard malfunctions
Causes
- Open or short circuit in communication bus B
- Fault in one of the modules connected to the bus
- Poor contact in connectors
- Interference in the electrical system
- Wiring harness damage
How to Fix
- Check continuity of communication bus B
- Inspect connectors for corrosion or damage
- Test modules connected to the bus
- Check for interference in the electrical system
- Replace damaged wires or connectors
Related codes
Error U0038 by Vehicle Brand
FAQ
What does the U0038 code mean?
U0038 is an OBD-II diagnostic trouble code that indicates: Vehicle Communication Bus B Performance
What causes a U0038 error code?
The most common causes of U0038 include: Open or short circuit in communication bus B; Fault in one of the modules connected to the bus; Poor contact in connectors; Interference in the electrical system.
How do I fix a U0038 diagnostic trouble code?
To fix U0038: Check continuity of communication bus B. Inspect connectors for corrosion or damage. Test modules connected to the bus. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0038?
Yes, but get it checked soon
How much does it cost to fix U0038?
The estimated repair cost for U0038 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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