P23C3
Engine Coolant Bypass Valve C Position Sensor Circuit
A general circuit fault on the position sensor of the third engine coolant bypass valve C - typically used in advanced thermal management systems with multiple coolant loops.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Open in sensor or wiringCommon
Parts involved
- Coolant Bypass Valve C Position Sensor
P23C3 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.