OBD-II Generic Error Code P0071: How to Fix It

Q: Can I drive with error code P0071?

Yes, but you may experience reduced fuel economy, poor engine performance, or incorrect climate control. It's best to fix it promptly to avoid potential drivability issues.

Q: What causes the P0071 code?

Common causes include a faulty ambient air temperature sensor, damaged wiring or connector, or a short to ground or voltage in the sensor circuit.

Q: How much does it cost to fix P0071?

The sensor itself typically costs $20-$50. If you DIY, total cost is just the part. A mechanic may charge $100-$200 including labor.

Q: Where is the ambient air temperature sensor located?

Usually behind the front grille, near the bumper, or sometimes inside the side mirror. Consult your vehicle's service manual.

Q: Will clearing the code fix P0071 permanently?

No, clearing the code only erases it from memory. If the underlying issue is not fixed, the code will return.

Abstract

Error code P0071 indicates that the Ambient Air Temperature (AAT) sensor is reporting a value outside its expected range. The sensor measures outside air temperature and helps the engine control module (ECM) adjust fuel mixture and other functions. This can cause poor fuel economy, hard starting, or incorrect climate control readings.