P2CEF
Auxiliary Thermostat A Stuck Open
P2CEF is an OBD-II diagnostic trouble code meaning: Auxiliary Thermostat A Stuck Open. Common causes: additional thermostat malfunction, problems with the thermostat electrical connections. Estimated repair cost: $17–56.
Symptoms
- The engine takes a long time to warm up
- Increased fuel consumption
- Unstable engine temperature
- Reduced interior heating efficiency
- Check Engine light comes on
Causes
- Additional thermostat malfunction
- Problems with the thermostat electrical connections
- Open or short circuit in thermostat control circuit
- Mechanical jamming of the thermostat
- Problems with the engine control unit
How to Fix
- Check thermostat electrical connections
- Test the thermostat operation
- Replace a faulty thermostat
- Check the integrity of the control circuit
- Reset the error code and test drive
Related codes
Error P2CEF by Vehicle Brand
FAQ
What does the P2CEF code mean?
P2CEF is an OBD-II diagnostic trouble code that indicates: Auxiliary Thermostat A Stuck Open
What causes a P2CEF error code?
The most common causes of P2CEF include: Additional thermostat malfunction; Problems with the thermostat electrical connections; Open or short circuit in thermostat control circuit; Mechanical jamming of the thermostat.
How do I fix a P2CEF diagnostic trouble code?
To fix P2CEF: Check thermostat electrical connections. Test the thermostat operation. Replace a faulty thermostat. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2CEF?
Yes, but get it checked soon
How much does it cost to fix P2CEF?
The estimated repair cost for P2CEF is $17–56. Actual cost depends on your vehicle, location, and labor rates.
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