Intake Air Temperature Sensor 2

The engine control unit (ECU) expects to see a temperature from the intake air temperature sensor 2, typically between 0°C and 100°C (32°F and 212°F). If the sensor reading is missing or above/below a certain range, this code triggers, which affects engine performance and efficiency.

The ECU monitors the intake air temperature sensor 2 output voltage, which should reflect the air temperature. A voltage that is out of range (usually below 0.5V or above 4.5V) indicates a problem, suggesting either a short circuit or an open circuit in the sensor wiring or a faulty sensor itself.

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.

1. 11. Check the wiring harness and connectors going to the intake air temperature sensor 2 for visible damage, corrosion, or loose connections. Decision: If any issues found, repair or replace them; if none found, proceed to step 2.
2. 22. Measure the voltage at the sensor connector while the engine is running. Expect to see a voltage between 0.5V and 4.5V. Decision: If the voltage is out of range, the sensor is likely faulty; replace it. If the voltage is within range, go to step 3.
3. 33. Inspect the intake air temperature sensor for physical damage or contamination. Decision: If the sensor is damaged, replace it. If it looks good, consider checking the ECU for faults.

• Faulty intake air temperature sensor 2
• Open or short circuit in the wiring
• Corroded or loose connector
• ECU calibration issue

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