P012F
Engine Coolant Temperature / Engine Oil Temperature Correlation
Engine coolant and oil temperature readings disagree beyond plausible limits. The engine coolant temperature sensor feeds warm-up enrichment, fan control and closed-loop entry — a stuck-cold reading keeps the engine in open loop and rich forever.
Engine coolant and oil temperature readings disagree beyond plausible limits. The engine coolant temperature sensor feeds warm-up enrichment, fan control and closed-loop entry — a stuck-cold reading keeps the engine in open loop and rich forever.
Common causes
- high
One sensor drifted
One of the most commonly reported causes for this code — check this first.
Typical part cost: $40-390
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P012F mean?
P012F means "Engine Coolant Temperature / Engine Oil Temperature Correlation". It is a generic OBD-II code that points to a fault in the fuel & air metering.
What are the most common causes of P012F?
one sensor drifted — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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