U0252
Lost Communication With Lighting Control Module - Rear B
U0252 is an OBD-II diagnostic trouble code meaning: Lost Communication With Lighting Control Module - Rear B. Common causes: open or short circuit in the module power supply circuit, damage to the wiring harness to the lighting module. Estimated repair cost: $17–89.
Symptoms
- Rear lights do not work (brake lights, side lights, turn signals)
- Error message on the dashboard
- Flashing or unstable rear lights
- No response to turning on the light
Causes
- Open or short circuit in the module power supply circuit
- Damage to the wiring harness to the lighting module
- Rear lighting control module malfunction
- Connector problems or contact corrosion
- Failures in ECU software
How to Fix
- Check fuses associated with the lighting system
- Inspect the wiring harness and connectors for damage.
- Check power and ground on the lighting module
- Scan the module for additional errors
- If necessary, replace the rear light control module
Related codes
Error U0252 by Vehicle Brand
FAQ
What does the U0252 code mean?
U0252 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Lighting Control Module - Rear B
What causes a U0252 error code?
The most common causes of U0252 include: Open or short circuit in the module power supply circuit; Damage to the wiring harness to the lighting module; Rear lighting control module malfunction; Connector problems or contact corrosion.
How do I fix a U0252 diagnostic trouble code?
To fix U0252: Check fuses associated with the lighting system. Inspect the wiring harness and connectors for damage.. Check power and ground on the lighting module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0252?
Limited driving only, diagnose soon
How much does it cost to fix U0252?
The estimated repair cost for U0252 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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