P0113low severityPowertrain
IAT Sensor 1 Circuit High Input
on 2021 Mazda Mazda3 2.5L Turbo I4 · FWD
What this code means
The IAT sensor circuit voltage is higher than expected, indicating very low temperature or open circuit.
Symptoms
- Check Engine Light
- Lean fuel mixture
- Hard cold starting
Common causes
- Open circuit
- Disconnected sensor
- Faulty sensor
- Corroded terminals
Diagnostic steps
- Test sensor resistance
- Check for open circuits
- Inspect connector
Repair notes
Repair open circuit or replace sensor.
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