U008B

Vehicle Communication Bus G (+) Open

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$6–56 (est.)

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

U008A U008C U008D