P011FEngine Coolant Temperature 2 / Ambient Air Temperature Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- This is the counterpart of P011E for the second coolant temperature sensor and only exists on engines that have one – for example at the engine outlet, the radiator or in the heater circuit. After a long standstill sensor 2 should also read roughly the outside temperature; if it disagrees with the ambient sensor beyond a calibrated limit at start-up, P011F is set without saying which sensor is wrong. No manufacturer document using exactly this code was found; the description rests on CARB plus the cold-soak comparisons documented by Mazda (sensor 2 in the heater hose) and Ford under other codes.
- What you may notice
- Check engine light on
- Usually no driving symptoms
- Likely causes
- PossibleCoolant temperature sensor 2 drifting
- PossibleAmbient temperature sensor faulty or influenced
- PossiblePreheater or block heater
- RareContact resistance at sensor 2
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €30 – €200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.