Intake Air Temperature Sensor Out of Range
Intake air temperature reading is out of expected range.
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What it means (plain English)
The engine computer checks the intake air temperature to adjust fuel delivery and timing. When the sensor reading is too high or low, it can't make the right adjustments, affecting performance.
What the computer is actually seeing
The engine control unit (ECU) expects the intake air temperature to be between -40°C to +125°C (-40°F to +257°F). A reading outside of this range triggers the fault code.
What a healthy reading looks like
Intake air temperature should be between -40°C and +125°C (-40°F to +257°F).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check intake air temperature sensor connector for tightness and corrosion. If damaged, repair or replace the connector.
- 22. Measure the voltage at the sensor while the engine is running. Expect about 0.5V to 4.5V depending on temperature. Is the voltage within this range? If not, the sensor is likely faulty.
- 33. Inspect the wiring harness for any signs of damage or wear. Repair any damaged wires.
- 44. Replace the intake air temperature sensor if it is still outside the expected range after checking wiring and connections.
Common causes
- Faulty intake air temperature sensor
- Wiring issues or poor connections
- Contaminated sensor or air intake system
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable, but performance may be affected. Fix soon to avoid potential fuel economy issues.
Will this code come back after clearing?
It may return if the underlying issue isn't fixed. Always diagnose thoroughly.
Why does this code pair with SPN 1102?
SPN 1102 indicates a malfunction with the engine coolant temperature sensor, which can cause related air intake issues.
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