Intake Air Temperature Sensor High Input
The IAT signal voltage is above threshold, which the ECU interprets as an implausibly cold intake (open-circuit-like behaviour). Usually open wiring or a sensor that has failed open.
Affected components
- Intake air temperature sensor
- Intake air temperature sensor wiring
Common causes
- High likelihood: Open circuit in sensor or wiring
- Medium likelihood: Corroded sensor connector
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.