Fuel and air

P00F0 — Intake Air Temperature Sensor 3 Circuit High (Bank 2)

Severity: medium Drive with care, to a shop

What P00F0 means

The engine control module monitors the signal voltage from intake air temperature sensor 3 on Bank 2. The sensor is a thermistor, so its resistance and signal voltage rise as air gets colder. P00F0 sets when the voltage stays above the expected range, which usually points to an open circuit or a failed sensor. Some references list this code as ISO/SAE reserved, so confirm the exact sensor location and definition for your vehicle.

Symptoms

  • Check Engine light on
  • Incorrect intake air temperature reading on a scan tool
  • Reduced power and sluggish acceleration
  • Higher fuel consumption
  • Rough running or hard starting when cold

Possible causes

  1. Failed intake air temperature sensor (Bank 2, sensor 3)
  2. Open signal wire or poor connector contact
  3. Corroded or loose connector terminals
  4. Open sensor ground circuit
  5. ECM or software fault (rare)
  6. Code is ISO/SAE reserved and defined differently by the manufacturer

How to diagnose

  1. Scan all codes and freeze frame data, and check the P00F0 definition for your specific model
  2. Read the sensor value on a scan tool; a stuck reading near -40°F/°C or an extreme value suggests an open circuit
  3. Inspect the sensor connector and harness for chafing, corrosion, moisture and a loose fit
  4. Unplug the sensor and check the reference voltage and ground at the connector
  5. Measure sensor resistance and compare it with the spec at the current temperature
  6. Test the wire between sensor and ECM for opens and shorts to power
  7. Jumper the signal to ground or try a known good sensor; the reading should change sharply
  8. If wiring and sensor are fine, test the ECM and look for software updates

Common fixes

  • Replace the intake air temperature sensor
  • Repair the wiring harness or replace the damaged connector
  • Clean corroded terminals and restore good contact
  • Reflash or replace the ECM if confirmed faulty

Questions and answers

What does P00F0 mean?

The ECM detected high voltage in the circuit of intake air temperature sensor 3 on Bank 2. The usual cause is an open circuit or a bad sensor. Some sources treat the code as ISO/SAE reserved.

Can I drive with code P00F0?

For a short time, such as to a repair shop, usually yes. The ECM falls back to default values, so fuel economy and throttle response may suffer. Avoid long-term driving with it.

How do I clear P00F0?

Fix the cause first, then clear the code with a scan tool. If the fault remains, the code will return after a few drive cycles.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.