P0113 — Intake Air Temperature (IAT) Sensor Circuit High Input
Drive with caution — fix soon.
What P0113 means
This code means the intake air temperature sensor is sending a signal that reads too high, which the computer interprets as extremely hot incoming air. The IAT sensor helps fine-tune the fuel mixture and ignition timing based on air temperature. A high signal usually points to a wiring break, a bad sensor, or a poor connection.
Common symptoms
- Check Engine light is on
- Slightly reduced fuel economy
- Minor hesitation or rough running in some cases
- Harder cold starts
- Often no obvious driving symptoms at all
Common causes
- Open circuit or broken wire to the IAT sensor
- Faulty IAT sensor
- Corroded or disconnected IAT connector
- High resistance in the signal wiring
- Sensor sometimes integrated with the MAF that has failed
- Poor ground connection
Typical repair cost
$75 – $250
Varies by vehicle and root cause.
Frequently asked questions
Can I drive with a P0113 code?
Yes, usually. This code rarely affects daily driving, but it's worth fixing so the engine keeps its fuel and timing settings accurate.
How much does it cost to fix P0113?
Often $75 to $250. A wiring or connector repair is inexpensive, while replacing the IAT sensor adds parts and labor.
Is P0113 serious?
It's a low-to-moderate concern. It won't strand you, but leaving it unfixed can slightly hurt fuel economy and emissions over time.
What does 'high input' mean for the IAT sensor?
It means the sensor's signal voltage is too high, which the computer reads as very hot air. This usually points to a broken wire or open circuit rather than actual heat.