U007B

Control Module Communication Bus I Off

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine light comes on
Unstable engine operation
Failure of some electronic systems
Problems with data transfer between modules

Causes

Broken or damaged CAN bus wires
Short circuit in the circuit
Malfunction of one of the control modules
Problems with module power supply
Contact corrosion

How to Fix

Check the integrity of the CAN bus wires
Inspect contacts for corrosion
Check power supply to control modules
Diagnose each module for faults
Replace damaged components

Related codes

U007A U007C U007D