Intake Air Temperature Sensor Circuit Malfunction
The ECU detects a general electrical fault in the intake air temperature (IAT) sensor circuit. Signal absent, shorted or out of plausible range. Generic catch-all when no more specific IAT code (low/high/range) is set.
Affected components
- Iat sensor
- Iat wiring
- Iat connector
Common causes
- High likelihood: IAT sensor failed (open or shorted)
- Medium likelihood: IAT wiring or connector fault
- Low likelihood: Combined MAF/IAT module faulty
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.