Intake Air Temperature Sensor Low Input
The IAT signal voltage is below threshold, which the ECU interprets as an implausibly hot intake (low NTC resistance). Usually a wiring short to ground or a failed sensor.
Affected components
- Intake air temperature sensor
- Intake air temperature sensor wiring
Common causes
- High likelihood: Signal wire shorted to ground
- Medium likelihood: Sensor failed shorted internally
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.