What it means
The Intake Air Temperature Sensor 1 reading for 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 1 reports air temperature at the sensing point designated Sensor 1 for Bank 2. P00AB sets when the control module sees a reading outside the expected range or one that responds unexpectedly, which can happen when the sensor has drifted or is loosely mounted.
Common causes
Most likely first.
- Sensor reading drifted
- Sensor element aged beyond calibration window
- Sensor mounting loose - signal damping
Symptoms
- Check engine light on
- Possible hesitation or reduced power
- Fuel economy may worsen
How to diagnose it
- Compare freeze-frame Bank 2 Sensor 1 temperature with ambient temperature after a cold soak to check for an implausible starting value.
- Watch live Sensor 1 data for Bank 2 during warm-up and note whether it changes smoothly and plausibly.
- Inspect the Sensor 1 mounting and connector for looseness, corrosion, contamination, or physical damage.
- Compare the Bank 2 Sensor 1 reading with other available intake-temperature readings under the same conditions to identify an outlier.
- Test the sensor and circuit against the manufacturer's specification before replacing parts.
Common fixes
- Secure the Bank 2 Sensor 1 sensor in its correct mounting.
- Reconnect the sensor and clean or repair corroded connector terminals.
- Repair any damaged wiring or poor circuit connection found during testing.
- Replace the Bank 2 Sensor 1 if its reading is outside the manufacturer's specification.
Can I keep driving?
A steady warning light with normal running generally permits a short drive, but schedule diagnosis because an inaccurate Bank 2 Sensor 1 reading can affect fuel economy and emissions. Avoid driving if hesitation or reduced power is pronounced.
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.