U0079

Control Module Communication Bus G Off

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–56 (est.)

Symptoms

Check Engine light comes on
Malfunction of related systems (for example, climate control, audio system)
Lost communication with one or more modules
Unstable operation of the dashboard

Causes

Broken or damaged communication bus wires
Short circuit in the circuit
Malfunction of one of the electronic modules
Poor contact in connectors
Problems with module power supply

How to Fix

Check the integrity of the communication bus wiring
Inspect connectors for oxidation or damage
Check power supply of connected modules
Read error codes of all modules for accurate diagnostics
If necessary, replace damaged components

Related codes

U0078 U0080 U0100