What are the common causes of P00F2?

Humidity sensor unplugged or a broken signal wire. Corroded or water-filled humidity sensor connector. A failed humidity sensing element. An open in the humidity sensor reference circuit. ECM humidity input fault after the wiring checks.

Check power, ground and reference at the humidity sensor. Inspect the humidity sensor connector for water or corrosion. Test the humidity sensor signal wire for an open. Read humidity live data and compare to a nearby reading. Replace the humidity sensor if the circuit tests good. Clear the code and retest.

P00F2

Humidity Sensor Circuit/Open

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

What it means

P00F2 means Humidity Sensor Circuit/Open.

Where it lives

For P00F2, the circuit described runs through the sensor. The description of P00F2 reports the sensor as open.

Check these first

Humidity sensor unplugged or a broken signal wire
Corroded or water-filled humidity sensor connector
A failed humidity sensing element
An open in the humidity sensor reference circuit
ECM humidity input fault after the wiring checks

What to do next

Check power, ground and reference at the humidity sensor
Inspect the humidity sensor connector for water or corrosion
Test the humidity sensor signal wire for an open
Read humidity live data and compare to a nearby reading
Replace the humidity sensor if the circuit tests good
Clear the code and retest

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Updated

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