U008B
Vehicle Communication Bus G (+) Open
U008B is an OBD-II diagnostic trouble code meaning: Vehicle Communication Bus G (+) Open. Common causes: broken wire in the can g+ line, poor contact in can bus connectors. Estimated repair cost: $6–56.
Symptoms
- Check Engine light comes on
- Loss of communication between some modules
- Incorrect operation of various vehicle systems
- Possible problems starting the engine
- Errors in the operation of electronic systems
Causes
- Broken wire in the CAN G+ line
- Poor contact in CAN bus connectors
- Short circuit in CAN G+ line
- Malfunction of one of the modules connected to the CAN bus
- Wiring harness damage
How to Fix
- Visual inspection of the CAN bus wiring for damage
- Checking the quality of contacts in connectors
- CAN G+ line resistance measurement
- Checking the voltage on the CAN G+ line
- Gradual shutdown of modules to find the faulty one
Related codes
Error U008B by Vehicle Brand
FAQ
What does the U008B code mean?
U008B is an OBD-II diagnostic trouble code that indicates: Vehicle Communication Bus G (+) Open
What causes a U008B error code?
The most common causes of U008B include: Broken wire in the CAN G+ line; Poor contact in CAN bus connectors; Short circuit in CAN G+ line; Malfunction of one of the modules connected to the CAN bus.
How do I fix a U008B diagnostic trouble code?
To fix U008B: Visual inspection of the CAN bus wiring for damage. Checking the quality of contacts in connectors. CAN G+ line resistance measurement. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U008B?
Do not drive — repair immediately
How much does it cost to fix U008B?
The estimated repair cost for U008B is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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