TorqueMech OBD Code Guide
P0113 - Intake Air Temperature Circuit High Input
IAT signal indicates very hot temperature (high voltage/open).
Severity
Low-Medium
Drivability
Hard cold start, rich running, poor fuel economy
Typical Cost
$80 - $350+
Code Meaning
IAT signal indicates very hot temperature (high voltage/open).
What You May Notice
- Rich running on cold start
- Poor fuel economy
- Delayed drivability correction after startup
- Check engine light with little else at times
Common Causes
Open circuit/unplugged IAT
IAT sensor failed
Quick Checks
- Check connector seated
- Inspect for broken wires
- Check sensor resistance
IAT Circuit Checks
- Compare IAT reading to ambient temperature on a cold soak
- Inspect the connector and harness for opens or broken conductors
- Verify the shared sensor reference and ground are stable
- Confirm whether the IAT is integrated into the MAF assembly before replacing parts
Likely Repairs
Use test results to confirm the fault before pricing the repair.
Mass air flow sensor replacement
Estimator-ready next step for a confirmed repair path.
Intake leak diagnosis
Estimator-ready next step for a confirmed repair path.
Throttle body service
Estimator-ready next step for a confirmed repair path.
Next Steps
Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.