OBD-II Generic Error Code P0073: How to Fix It

Q: Can I drive with error code P0073?

Yes, you can usually drive short distances, but the vehicle may not control HVAC properly and fuel economy might be slightly affected. It's best to fix it promptly to avoid potential driveability issues.

Q: What causes a P0073 code?

Common causes include a faulty ambient air temperature sensor, a short to power in the sensor circuit, corroded or damaged wiring/connectors, or rarely a defective ECM.

Q: How much does it cost to fix P0073?

The sensor typically costs $20-$60. DIY repair costs under $100. A mechanic may charge $100-$200 including diagnostics and labor.

Q: Will disconnecting the battery clear the code?

Temporarily yes, but the code will return if the underlying issue isn't fixed. Use an OBD2 scanner to clear codes after repair.

Q: Is the ambient air temperature sensor the same as the intake air temperature sensor?

No. The ambient air temperature sensor measures outside air temperature, while the intake air temperature sensor measures air entering the engine. They are different components.

Abstract

Error code P0073 indicates that the Engine Control Module (ECM) has detected a high voltage signal from the ambient air temperature (AAT) sensor circuit. This sensor measures outside air temperature and helps with engine management and HVAC control. A high input usually means a short to power, a faulty sensor, or wiring issues.