U0273
Lost Communication With Lighting Driver Control Module A
U0273 is an OBD-II diagnostic trouble code meaning: Lost Communication With Lighting Driver Control Module A. Common causes: open or short circuit in the module power supply circuit, damage to the wiring harness to the module. Estimated repair cost: $33–167.
Symptoms
- Headlights or side lights do not work
- Flashing or spontaneous turning on/off of the light
- Error message on the dashboard
- Non-adjustable headlight brightness
- No response to light switch
Causes
- Open or short circuit in the module power supply circuit
- Damage to the wiring harness to the module
- Lighting control module malfunction
- Poor contact in connectors
- Problems with the CAN bus
How to Fix
- Check fuses associated with the lighting system
- Inspect the wiring harness and connectors for damage.
- Check power and ground on the control module
- Scan other modules for CAN bus errors
- If necessary, replace the lighting control module
Related codes
Error U0273 by Vehicle Brand
FAQ
What does the U0273 code mean?
U0273 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Lighting Driver Control Module A
What causes a U0273 error code?
The most common causes of U0273 include: Open or short circuit in the module power supply circuit; Damage to the wiring harness to the module; Lighting control module malfunction; Poor contact in connectors.
How do I fix a U0273 diagnostic trouble code?
To fix U0273: Check fuses associated with the lighting system. Inspect the wiring harness and connectors for damage.. Check power and ground on the control module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0273?
Do not drive — repair immediately
How much does it cost to fix U0273?
The estimated repair cost for U0273 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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