Intake Air Temperature Sensor 2
Indicates a problem with the intake air temperature sensor 2 circuit.
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What it means (plain English)
The engine's computer is reading a temperature that doesn't match the actual temperature of the incoming air, which can mess with fuel delivery and performance.
What the computer is actually seeing
The ECM expects to see a temperature reading that correlates with the airflow and pressure data. If sensor 2 reports a temperature significantly lower than the anticipated value, it triggers this fault.
What a healthy reading looks like
The intake air temperature should generally be around ambient temperature or slightly higher; the sensor should produce a voltage signal of 0.5 to 4.5 volts depending on temperature.
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.
- 1Check the wiring and connectors for damage, corrosion, or loose connections. If found, repair/replace as necessary.
- 2Using a multimeter, check the voltage at the intake air temperature sensor 2. It should range between 0.5 to 4.5 volts with temperature changes. If it remains constant or out of range, the sensor may need replacement.
- 3Inspect the intake air system for leaks or blockages that might affect the air temperature. Ensure clean airflow to the sensor.
- 4If all previous checks out, replace the intake air temperature sensor 2 and clear the code.
Common causes
- Shorted or open circuit in sensor wiring
- Faulty intake air temperature sensor 2
- Corrosion or damage in connectors
- Engine overheating affecting sensor response
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code present?
It's generally safe to drive, but performance may be affected. The engine might hesitate or run rough.
Will the code come back after clearing?
It may come back if the underlying issue isn't fixed. Monitor engine performance after repairs.
Why does it pair with other codes?
The intake air temperature affects fuel mixture; if there's a temperature issue, it can trigger other related sensor issues.
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