P0113
Intake air temperature sensor 1 circuit high input
The ECU is seeing an abnormally high-voltage signal from intake air temperature sensor 1, often equivalent to an implausibly cold reading.
What this code means
The ECU is seeing an abnormally high-voltage signal from intake air temperature sensor 1, often equivalent to an implausibly cold reading.
Possible causes
- Disconnected IAT sensor
- Open circuit in sensor wiring
- Poor connector contact
- Failed IAT sensor or integrated MAF/IAT assembly
Common symptoms
- Check engine light
- Incorrect intake-temperature reading on scan data
- Possible poor cold-start or fuel-trim behaviour
Checks to make
- Compare IAT live data with ambient temperature on a cold engine
- Inspect the sensor connector
- Check wiring continuity and reference circuits
Safety
- Do not replace parts from the code alone. Confirm the fault with live data, wiring checks and manufacturer procedures. Keep clear of hot or moving engine components.
Model notes
The code definition is generic; exact diagnostic thresholds, component locations and repair procedures vary by vehicle.