U0663
Lost Communication With Rear Mode Actuator
U0663 is an OBD-II diagnostic trouble code meaning: Lost Communication With Rear Mode Actuator. Common causes: open or short circuit in the rear drive mode circuit, rear drive mode malfunction. Estimated repair cost: $33–167.
Symptoms
- Check Engine Light Is On
- The car goes into emergency mode
- Loss of rear-wheel drive mode functionality
- Inability to switch driving modes
- Decreased performance
Causes
- Open or short circuit in the rear drive mode circuit
- Rear drive mode malfunction
- Problems with the wiring harness or connectors
- Software error in the ECU
- Power or grounding problems
How to Fix
- Check the integrity of the rear drive mode circuit
- Inspect connectors and wiring harness for damage
- Check the functionality of the rear-wheel drive mode
- Scan the ECU for errors and update the software if necessary
- Check circuit power and grounding
Related codes
Error U0663 by Vehicle Brand
FAQ
What does the U0663 code mean?
U0663 is an OBD-II diagnostic trouble code that indicates: Lost Communication With Rear Mode Actuator
What causes a U0663 error code?
The most common causes of U0663 include: Open or short circuit in the rear drive mode circuit; Rear drive mode malfunction; Problems with the wiring harness or connectors; Software error in the ECU.
How do I fix a U0663 diagnostic trouble code?
To fix U0663: Check the integrity of the rear drive mode circuit. Inspect connectors and wiring harness for damage. Check the functionality of the rear-wheel drive mode. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0663?
Limited driving only, diagnose soon
How much does it cost to fix U0663?
The estimated repair cost for U0663 is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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