P00A3
Charge Air Cooler Temperature Sensor Circuit High Bank 2
Charge air cooler temperature sensor signal voltage on bank 2 above expected range. Typically open circuit or short to power.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Signal wire openCommon
- Connector pins corroded - high contact resistanceLess likely
- Supply wire pinched against B+ sourceLess likely
Parts involved
- Cac Temperature Sensor
- Sensor Wiring
P00A3 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.