Intake Air Temp Sensor 2 Circuit Range/Performance Problem
A problem is detected in the intake air temperature sensor 2 circuit.
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What it means (plain English)
The engine control module (ECM) is getting readings from the intake air temp sensor 2 that are out of the expected range, which can affect performance and emissions.
What the computer is actually seeing
The ECM sees an abnormal voltage from the intake air temperature sensor 2, typically lower than 0.5V or higher than 4.5V, when it should normally be between 0.5V to 4.5V depending on the intake air temperature.
What a healthy reading looks like
Intake air temperature readings should be within -40°F to 250°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.
- 1Inspect wiring and connectors for damage, fraying, or corrosion. Repair as necessary. Decision: If damage is found, repair it and retest. If no damage is found, proceed to next step.
- 2Measure the voltage at the intake air temperature sensor 2 with a multimeter. Expected voltage should be between 0.5V and 4.5V. Decision: If voltage is out of range, replace the sensor. If within range, proceed to next step.
- 3Check the intake air temperature reading through a scan tool. Compare it with expected values. Decision: If readings are significantly inaccurate, recheck connections, then consider replacing the ECM if all else checks out.
Common causes
- Faulty intake air temperature sensor 2
- Damaged wiring or connectors to the sensor
- ECM software issue
- Contaminated or blocked sensor
- High air pressure or vacuum leaks
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's generally safe to drive, but you may experience decreased performance or emissions issues. Fix it soon.
How long will this code stay active?
If the problem persists, the code will remain until the issue is resolved or the system is reset.
Why do I see this code with P0110?
Both codes deal with intake air temperature sensors; one might be affecting the other, indicating a broader issue with temperature sensing.
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