P00A2Charge Air Cooler Temperature Sensor Circuit Low Bank 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- The charge air cooler temperature sensor for bank 2 (an NTC thermistor) measures the charge air temperature in the second charge-air path, for example on V engines with two charge air coolers. The engine control module uses it for the air mass calculation, boost control and component protection. For P00A2, the sensor signal is below its valid range. With the usual voltage-type NTC sensor this means a short to ground, and the control module reads an extremely high temperature; some manufacturers use sensors with a frequency output, where a low signal instead corresponds to an extremely low temperature (open circuit or short to ground). Bank 2 codes occur only on engines with two separate intake or charge-air paths, one per cylinder bank.
- What you may notice
- Check engine light on
- Usually no noticeable symptoms
- Slightly changed power or knock control with an implausible reading
- Likely causes
- LikelySensor shorted internally or signal wire shorted to ground
- PossibleConnector damp or corroded
- PossibleOn frequency-output sensors: open circuit
- RareEngine control module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €40 – €250
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.