Inlet Air Temperature Sensor 2 - Voltage Above Normal Operating Range
The inlet air temperature sensor 2 is sending a voltage that is too high for normal operation.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The sensor responsible for measuring the air temperature entering the engine is detecting a voltage that indicates a temperature that's excessively high, possibly due to wiring issues or a malfunctioning sensor.
What the computer is actually seeing
The engine control module (ECM) typically expects a voltage between 0.5V to 4.5V, corresponding to an inlet air temperature range of approximately -40°C to +125°C. A voltage above 4.5V suggests a problem.
What a healthy reading looks like
Normal voltage range: 0.5V to 4.5V; Faulty voltage: >4.5V.
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. Inspect the wiring and connector for the inlet air temperature sensor 2. Look for signs of damage, corrosion, or shorts.
- 22. Check the voltage at the sensor connector with the key on, engine off. Expected voltage should be in the normal operating range (0.5V to 4.5V).
- 33. If the voltage is above 4.5V, disconnect the sensor and check the voltage again. If the voltage drops to normal, replace the sensor.
- 44. If the voltage remains high after disconnecting the sensor, further investigate the wiring for shorting.
- 55. Clear the fault code and run the engine to see if the code returns.
Common causes
- Wiring harness short to voltage
- Failed inlet air temperature sensor 2
- Faulty ECU (rare)
- Corrosion at connectors
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended. High inlet air temperature can lead to engine performance issues and possible damage.
Will this code return after clearing it?
If the underlying issue is not fixed, the code will likely return after a short period of driving.
Why does this code show up with other codes?
Issues with the inlet air temperature may affect or be affected by other sensors and systems, leading to multiple fault codes.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →