P0073 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0073 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0073 code.

What Does P0073 Code Mean?

OBD-II Code P0073 is defined as a Ambient Air Temperature Sensor Circuit High

The ambient temperature sensor helps the engine control module (PCM) determine how much fuel to use on startup. The PCM also uses this signal as a logic reference for other temperature sensors on the engine. If the PCM detects an issue with the signal from this sensor, it will set code P0073.

P0073 Symptoms

• Hard engine start

Common Problems That Trigger the P0073 Code

• Ambient air temperature sensor failure
• Powertrain Control Module (PCM) failure
• Wiring issue