Powertrain, generic · Fuel and air metering

P011F Engine Coolant Temperature 2 / Ambient Air Temperature Correlation

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

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.

Likely causes

Coolant temperature sensor 2 drifting
Ambient temperature sensor faulty or influenced
Preheater or block heater
Contact resistance at sensor 2

Symptoms

  • Check engine light on
  • Usually no driving symptoms

Repair estimate

DifficultyEasyDIY possible
Parts and labour€30–200
Time0.3–2 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

engine coolant temperature sensor 2ambient air temperature sensorsensor wiring

Related codes

P011EP011AP2183P011BP0071

References: law.cornell.edu, static.nhtsa.gov, fordservicecontent.com.