What are the common causes of P011F?

ECT sensor 2 and ambient sensor disagree after a cold soak. A biased ECT sensor 2. A biased ambient air temperature sensor. Wiring or a connector fault on ECT 2 or the ambient sensor. Low coolant or an air pocket at ECT 2.

Cold soak the engine and compare ECT 2 and ambient live data. Check coolant level and bleed any air at ECT 2. Inspect ECT 2 and ambient sensor connectors. Test both circuits for opens and shorts. Replace the sensor that reads off. Clear the code and retest.

P011F

Engine Coolant Temperature 2 / Ambient Air Temperature Correlation

System: Fuel and air metering (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P011F means Engine Coolant Temperature 2 / Ambient Air Temperature Correlation.

Check these first

ECT sensor 2 and ambient sensor disagree after a cold soak
A biased ECT sensor 2
A biased ambient air temperature sensor
Wiring or a connector fault on ECT 2 or the ambient sensor
Low coolant or an air pocket at ECT 2

What to do next

Cold soak the engine and compare ECT 2 and ambient live data
Check coolant level and bleed any air at ECT 2
Inspect ECT 2 and ambient sensor connectors
Test both circuits for opens and shorts
Replace the sensor that reads off
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.