P0E77
Coolant Bypass Valve A Control Circuit High
P0E77 is an OBD-II diagnostic trouble code meaning: Coolant Bypass Valve A Control Circuit High. Common causes: open circuit in valve control circuit, short circuit to positive in the circuit. Estimated repair cost: $17–56.
Symptoms
- Engine overheating
- Insufficient engine warm-up
- Unstable engine operation
- Increased fuel consumption
- Check Engine Light Illuminates
Causes
- Open circuit in valve control circuit
- Short circuit to positive in the circuit
- Coolant bypass valve malfunction
- Wiring Harness Problems
- Engine control unit (ECU) malfunction
How to Fix
- Check valve control circuit integrity
- Check the resistance of the coolant bypass valve
- Inspect the wiring harness for damage
- Check the operation of the coolant bypass valve
- If necessary, replace the valve or repair the circuit
Related codes
Error P0E77 by Vehicle Brand
FAQ
What does the P0E77 code mean?
P0E77 is an OBD-II diagnostic trouble code that indicates: Coolant Bypass Valve A Control Circuit High
What causes a P0E77 error code?
The most common causes of P0E77 include: Open circuit in valve control circuit; Short circuit to positive in the circuit; Coolant bypass valve malfunction; Wiring Harness Problems.
How do I fix a P0E77 diagnostic trouble code?
To fix P0E77: Check valve control circuit integrity. Check the resistance of the coolant bypass valve. Inspect the wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0E77?
Limited driving only, diagnose soon
How much does it cost to fix P0E77?
The estimated repair cost for P0E77 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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