P00A2
Charge Air Cooler Temperature Sensor Circuit Low Bank 2
Charge-air cooler temperature
Generic OBD-II
Low
What it means
P00A2 means the bank 2 charge-air-cooler (intercooler) temperature sensor is reading an abnormally low voltage — usually a short to ground or a failed sensor. This sensor tells the ECM how warm the compressed intake air is after the intercooler on a turbo- or supercharged engine, so it can trim fueling, boost, and timing. On its own it rarely affects how the car drives.
Low
Can I keep driving? Yes — this sensor only fine-tunes fueling, boost, and timing on forced-induction engines; the car drives normally, with at most slightly reduced performance under hard boost.
Common symptoms
What you'll notice
- Check-engine light on
- Little or no change in how the car drives
- Possibly slightly reduced boost or power under load
- Implausibly low intake-air temperature reading on a scan tool
Common causes
Most likely first
- Signal wire shorted to ground in the sensor circuit — the usual cause of a 'low' codeLikely
- Failed charge-air-cooler (intercooler) temperature sensor on bank 2Common
- Corroded or damaged connector at the sensorCommon
- Rarely, an ECM faultLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the bank 2 sensor reading is stuck low.
- Inspect the sensor connector and wiring for damage, corrosion, or a wire shorted to ground.
- Compare the sensor's resistance/voltage to spec; replace the sensor if out of range.
- Repair any shorted wiring, clear the code, and re-test.
FAQ
Quick answers
Is it safe to drive with P00A2?+
Generally yes. It's a low-severity sensor fault that mainly affects fine boost and fuel trimming, not safe operation. Fix it to keep the engine tuned correctly, but it isn't an emergency.
Can I just clear P00A2?+
You can, but if the sensor or its wiring is shorted the code returns quickly. Fix the circuit first.
Related codes
Often seen with P00A2
Read & clear P00A2 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX