What it means
The intake air temperature sensor 3 reading on bank 2 is outside the expected range or does not behave as expected.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
Intake air temperature sensor 3 on bank 2 reports air temperature to the engine control module for engine control adjustments. This code sets when the bank 2 sensor 3 reading is outside its expected range or does not change as expected, even if the circuit is not clearly open or shorted.
Common causes
Most likely first.
- Sensor reading drifted
- Sensor element aged beyond calibration window
- Sensor mounting loose - signal damping
Symptoms
- Check-engine light on
- Reduced engine performance or power
- Poor fuel economy
How to diagnose it
- Review freeze-frame conditions and compare bank 2 sensor 3 live data with other temperature readings during a cold start and warm-up.
- Inspect the bank 2 sensor 3 mounting and connector for looseness, contamination, corrosion, or signs that the sensor is not seated securely.
- Check the sensor wiring for damage or poor terminal contact that could distort or damp the signal.
- Observe whether the bank 2 sensor 3 reading responds plausibly as intake air temperature changes and compare it with the vehicle's diagnostic procedure.
- Test the sensor response and mounting against the manufacturer's specification before replacing the sensor.
Common fixes
- Secure the bank 2 sensor 3 mounting so it is seated as designed.
- Clean or repair poor electrical contact at the sensor connector.
- Repair damaged wiring affecting the bank 2 sensor 3 signal.
- Replace the sensor if its reading drifts or fails the specified response test.
Can I keep driving?
You can usually drive gently if the engine behaves normally, but avoid towing or hard acceleration while power or fuel economy is affected. Have the sensor reading checked soon because inaccurate bank 2 temperature data can lead to poor engine control.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.