Faulty intake air temperature sensor 3 (open circuit inside the sensor); Corroded, loose or damaged connector terminals at the sensor; Open circuit or high resistance in the signal or ground wire to the sensor; Signal wire short to a voltage supply; Damaged or chafed wiring harness near hot or moving components; Fault in the control unit or its sensor reference supply.

P00F0

Intake Air Temperature Sensor 3 Circuit High Bank 2.

Generic
Powertrain
Generic code
Low severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
0: AreaFuel and air metering, auxiliary emission controls
F0: FaultThe specific fault in that area

What it means

P00F0 is a generic code meaning the control unit has detected a high voltage signal in the circuit of intake air temperature sensor 3 on bank 2. The sensor is a thermistor, so a very high signal voltage equates to an implausibly low air temperature, usually caused by an open circuit, a poor connection or a failed sensor. Which physical sensor is 'sensor 3' and where it sits depends on the engine and model.

Symptoms

Engine warning light on
Poor or rough running, particularly from cold
Hesitation or reduced performance
Hard starting or extended cranking in cold conditions
Poorer fuel economy
Possible limp mode on some engines

Possible causes

Faulty intake air temperature sensor 3 (open circuit inside the sensor)likely
Corroded, loose or damaged connector terminals at the sensorlikely
Open circuit or high resistance in the signal or ground wire to the sensorlikely
Signal wire short to a voltage supplypossible
Damaged or chafed wiring harness near hot or moving componentspossible
Fault in the control unit or its sensor reference supplyrare

How to diagnose

Read all stored codes and the freeze frame data, noting engine temperature and load when the fault set, and check for related intake temperature codes on the other sensors.
Check the manufacturer's information to identify which sensor is intake air temperature sensor 3 and where it is fitted on this engine.
Compare the live intake air temperature readings from all sensors with the engine cold; they should be close to ambient and to each other. A reading stuck at the lowest value points to an open circuit.
Inspect the sensor, connector and harness for damage, corrosion, water ingress, bent terminals and chafing.
Unplug the sensor and check the connector for reference voltage and a good ground using a multimeter, as specified in the wiring diagram.
Check the sensor resistance against the manufacturer's temperature table, and test it with gentle warming to see that the value changes smoothly.
Test the signal and ground wires for continuity and for shorts to voltage or to each other, working back to the control unit connector.
Clear the code and road test, rechecking live data to confirm the fault does not return.

How to fix

Replace intake air temperature sensor 3 if it is open circuit or out of specification.
Clean or repair corroded connector terminals, or replace the connector if the terminals are damaged.
Repair or replace the open circuit or high resistance wiring between the sensor and the control unit.
Repair any short to voltage on the signal wire and secure the harness away from heat and movement.
Diagnose the control unit and its supply only after all wiring and sensor faults have been ruled out.

Can I keep driving?

Low severity

The car can usually be driven short term, but the control unit may use a default air temperature, which can affect running and economy. Book it in soon, and stop driving if the car goes into limp mode or runs badly.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.