The P0073 diagnostic trouble code (DTC) indicates that there is a high voltage condition in the Ambient Air Temperature (AAT) sensor circuit. The AAT sensor is responsible for measuring the temperature …

Jul 15, 2025 · Scan tool showing a P0073 code? There's a problem with your ambient air temperature sensor. Here's how to troubleshoot it step by step.

Nov 12, 2025 · Learn what the P0073 code means, its causes, and how to fix an ambient air temperature sensor issue. Simple diagnosis and repair tips inside.

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.

If all prior tests have passed and you continue to get a P0073, this would most likely indicate a failed AAT sensor, although a failed control module could not be ruled out until the AAT sensor had been …

When the Engine Control Module (ECM) detects high input voltage from this sensor, it triggers the P0073 code. Essentially, it signals that something is amiss in how your car gauges external …

May 24, 2024 · If you’re seeing the P0073 code, this guide will help you understand its meaning, symptoms, causes, and fixes. You’re likely reading this because your car’s throwing the P0073 …

May 27, 2024 · DTC P0073 stands for “Ambient Air Temperature Circuit High.” The code is logged once there’s a possible issue with your AAT sensor. Your vehicle’s ambient air temperature sensor …

Sep 13, 2025 · Learn all about the P0073 code, what causes ambient air temperature sensor circuit high, and how to diagnose and fix common issues to maintain optimal engine performance.

Sep 26, 2022 · Most of the time, P0073 is going to be caused by a bad AAT sensor or AAT sensor wiring. On most vehicles, the AAT sensor can be found around the front grill or bumper. 1. Check the …