P0E79
Coolant Bypass Valve A Control Stuck/Open
P0E79 is an OBD-II diagnostic trouble code meaning: Coolant Bypass Valve A Control Stuck/Open. Common causes: stuck coolant valve, open or short circuit in control circuit. Estimated repair cost: $17–56.
Symptoms
- Unstable engine temperature
- Poor interior heating
- Extended engine warm-up time
- Check Engine light comes on
- Possible errors in related systems
Causes
- Stuck coolant valve
- Open or short circuit in control circuit
- Problems with the engine control unit
- Valve contaminated or corroded
- Valve solenoid malfunction
How to Fix
- Check valve electrical circuit
- Test the resistance of the electromagnet winding
- Clean or replace coolant valve
- Check thermostat operation
- Reset error and test drive
Related codes
Error P0E79 by Vehicle Brand
FAQ
What does the P0E79 code mean?
P0E79 is an OBD-II diagnostic trouble code that indicates: Coolant Bypass Valve A Control Stuck/Open
What causes a P0E79 error code?
The most common causes of P0E79 include: Stuck coolant valve; Open or short circuit in control circuit; Problems with the engine control unit; Valve contaminated or corroded.
How do I fix a P0E79 diagnostic trouble code?
To fix P0E79: Check valve electrical circuit. Test the resistance of the electromagnet winding. Clean or replace coolant valve. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0E79?
Yes, but get it checked soon
How much does it cost to fix P0E79?
The estimated repair cost for P0E79 is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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