U0484
Invalid Data Received From Lighting Control Module - Rear A
U0484 is an OBD-II diagnostic trouble code meaning: Invalid Data Received From Lighting Control Module - Rear A. Common causes: damage to the wiring harness to the lighting module, rear lighting control module malfunction. Estimated repair cost: $28–89.
Symptoms
- Incorrect operation of rear lights
- Brake lights flashing or turning off
- Error message on the dashboard
- Problems with other rear lighting functions
- False alarms
Causes
- Damage to the wiring harness to the lighting module
- Rear lighting control module malfunction
- Poor contact in connectors
- Short circuit in the circuit
- Software error in the module
How to Fix
- Check the integrity of the wiring harness to the module
- Inspect and clean the connector contacts
- Check the power supply and ground of the module
- Test or replace rear light module
- Update module software (if available)
Related codes
Error U0484 by Vehicle Brand
FAQ
What does the U0484 code mean?
U0484 is an OBD-II diagnostic trouble code that indicates: Invalid Data Received From Lighting Control Module - Rear A
What causes a U0484 error code?
The most common causes of U0484 include: Damage to the wiring harness to the lighting module; Rear lighting control module malfunction; Poor contact in connectors; Short circuit in the circuit.
How do I fix a U0484 diagnostic trouble code?
To fix U0484: Check the integrity of the wiring harness to the module. Inspect and clean the connector contacts. Check the power supply and ground of the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0484?
Do not drive — repair immediately
How much does it cost to fix U0484?
The estimated repair cost for U0484 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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