U0079
Control Module Communication Bus G Off
U0079 is an OBD-II diagnostic trouble code meaning: Control Module Communication Bus G Off. Common causes: broken or damaged communication bus wires, short circuit in the circuit. Estimated repair cost: $6–56.
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
Error U0079 by Vehicle Brand
FAQ
What does the U0079 code mean?
U0079 is an OBD-II diagnostic trouble code that indicates: Control Module Communication Bus G Off
What causes a U0079 error code?
The most common causes of U0079 include: Broken or damaged communication bus wires; Short circuit in the circuit; Malfunction of one of the electronic modules; Poor contact in connectors.
How do I fix a U0079 diagnostic trouble code?
To fix U0079: Check the integrity of the communication bus wiring. Inspect connectors for oxidation or damage. Check power supply of connected modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0079?
Yes, but get it checked soon
How much does it cost to fix U0079?
The estimated repair cost for U0079 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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