U063C
Lost Communication With Coolant Bypass Valve Actuator B
U063C is an OBD-II diagnostic trouble code meaning: Lost Communication With Coolant Bypass Valve Actuator B. Common causes: open or short circuit in valve circuit, coolant bypass valve malfunction. Estimated repair cost: $17–67.
Symptoms
- Check Engine Light Is On
- Unstable engine operation
- Increased engine temperature
- Reduced cooling system efficiency
- Errors in climate control operation
Causes
- Open or short circuit in valve circuit
- Coolant bypass valve malfunction
- Connector problems or contact corrosion
- Engine ECU malfunction
- Wiring Harness Problems
How to Fix
- Check valve control circuit integrity
- Inspect connectors and contacts for damage
- Check valve resistance and operation
- Scan the ECU for additional errors
- Replace the coolant bypass valve if necessary.
Related codes
Error U063C by Vehicle Brand
FAQ
What does the U063C code mean?
U063C is an OBD-II diagnostic trouble code that indicates: Lost Communication With Coolant Bypass Valve Actuator B
What causes a U063C error code?
The most common causes of U063C include: Open or short circuit in valve circuit; Coolant bypass valve malfunction; Connector problems or contact corrosion; Engine ECU malfunction.
How do I fix a U063C diagnostic trouble code?
To fix U063C: Check valve control circuit integrity. Inspect connectors and contacts for damage. Check valve resistance and operation. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U063C?
Limited driving only, diagnose soon
How much does it cost to fix U063C?
The estimated repair cost for U063C is $17–67. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat