U012F
Lost Communication With Generator B Control Module
U012F is an OBD-II diagnostic trouble code meaning: Lost Communication With Generator B Control Module. Common causes: broken or damaged wires in the communication circuit, generator control module b malfunction. Estimated repair cost: $22–167.
Symptoms
- Check Engine Light Is On
- Reduced charging system efficiency
- Unstable operation of electrical equipment
- Floating engine speed
- Error message on the dashboard
Causes
- Broken or damaged wires in the communication circuit
- Generator control module B malfunction
- Control module power problems
- Short circuit in communication circuit
- Software failure in the ECU
How to Fix
- Check the integrity of the wiring harness to generator module B
- Diagnose power and ground of the control module
- Check communication with the module using a diagnostic scanner
- Flash or replace generator control module B (if necessary)
- Eliminate possible corrosion in connectors
Related codes
Error U012F by Vehicle Brand
FAQ
What does the U012F code mean?
U012F is an OBD-II diagnostic trouble code that indicates: Lost Communication With Generator B Control Module
What causes a U012F error code?
The most common causes of U012F include: Broken or damaged wires in the communication circuit; Generator control module B malfunction; Control module power problems; Short circuit in communication circuit.
How do I fix a U012F diagnostic trouble code?
To fix U012F: Check the integrity of the wiring harness to generator module B. Diagnose power and ground of the control module. Check communication with the module using a diagnostic scanner. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U012F?
Yes, but get it checked soon
How much does it cost to fix U012F?
The estimated repair cost for U012F is $22–167. Actual cost depends on your vehicle, location, and labor rates.
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