Inlet Air Temperature Sensor Circuit
The ECU has detected an issue with the Inlet Air Temperature sensor circuit.
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 Inlet Air Temperature sensor measures how hot the air coming into the engine is. If the sensor sends bad data or has a broken connection, it may not work properly.
What the computer is actually seeing
The ECU monitors the voltage from the Inlet Air Temperature sensor, expecting a range of 0.5V to 4.5V depending on the temperature. If it sees values outside this range, or if the signal is missing, it triggers the fault.
What a healthy reading looks like
The typical voltage output from the Inlet Air Temperature sensor should be between 0.5V (about -40°C) and 4.5V (about 125°C).
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 the connector at the Inlet Air Temperature sensor for damage or corrosion. Repair as necessary.
- 2Check the wiring for continuity. Look for open or short circuits using a multimeter.
- 3Measure the voltage at the sensor connector with the engine running. Should be within 0.5V to 4.5V. If not, replace the sensor.
- 4If no voltage is present at the connector, check the wiring back to the ECU.
Common causes
- Open or shorted wiring in the sensor circuit
- Faulty Inlet Air Temperature sensor
- Corroded or loose connections at the sensor
- Faulty ECU causing incorrect readings
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
It's drivable but might lead to poor engine performance or emissions issues, so fix it soon.
Will this code come back after I clear it?
If the underlying issue isn't resolved, this code will likely return.
Why do I see this code paired with SPN 35?
SPN 35 is often linked as it deals with the Intake Air Temperature range and may indicate similar sensor issues.
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