U1066
Loss Of Communication With Rear Integrated Module
U1066 is an OBD-II diagnostic trouble code meaning: Loss Of Communication With Rear Integrated Module. Common causes: open or short circuit in wiring harness, rear integrated module malfunction. Estimated repair cost: $33–167.
Symptoms
- Taillights or brake lights do not work
- Rear windshield wipers do not function
- Check Engine Light Is On
- Errors in other systems related to the rear module
- Problems with the central locking of the rear doors
Causes
- Open or short circuit in wiring harness
- Rear integrated module malfunction
- Poor contact in connectors
- Module power problems
- Software failure in the module
How to Fix
- Check the integrity of the wiring harness to the rear module
- Inspect and clean the connector contacts
- Check fuses associated with the module
- Test the power supply at the module connector
- If necessary, replace the rear integrated module
Related codes
FAQ
What does the U1066 code mean?
U1066 is an OBD-II diagnostic trouble code that indicates: Loss Of Communication With Rear Integrated Module
What causes a U1066 error code?
The most common causes of U1066 include: Open or short circuit in wiring harness; Rear integrated module malfunction; Poor contact in connectors; Module power problems.
How do I fix a U1066 diagnostic trouble code?
To fix U1066: Check the integrity of the wiring harness to the rear module. Inspect and clean the connector contacts. Check fuses associated with the module. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U1066?
Do not drive — repair immediately
How much does it cost to fix U1066?
The estimated repair cost for U1066 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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