Intake Air Temperature/Ambient Air Temperature Correlation

Descripción

This code means the car's computer has found a significant difference between the readings from the Intake Air Temperature (IAT) sensor and the Ambient Air Temperature (AAT) sensor. These sensors should normally report similar values.

Pasos de reparación

1. 1 Check for any obvious obstructions or leaks in the air intake system (e.g., disconnected hoses, clogged air filter, or debris blocking airflow).
2. 2 Inspect the wiring and connectors to the Intake Air Temperature (IAT) sensor for damage, corrosion, or loose connections.
3. 3 Inspect the wiring and connectors to the Ambient Air Temperature (AAT) sensor for damage, corrosion, or loose connections.
4. 4 Compare live data readings from both the IAT and AAT sensors using an OBD-II scanner with the engine cold — both should read within a few degrees of actual ambient temperature.
5. 5 Replace the Intake Air Temperature (IAT) sensor if its reading is significantly off from the actual ambient temperature.
6. 6 Replace the Ambient Air Temperature (AAT) sensor if its reading is significantly off from the actual ambient temperature.
7. 7 Repair or replace any damaged wiring or connectors found in the IAT or AAT sensor circuits.
8. 8 If all sensors and wiring test normal, have the Engine Control Module (ECM) inspected and reprogrammed or replaced by a professional.

Diagnóstico y costo