P2CC3
Generator Voltage Sense Circuit B Low
The voltage sense circuit B for the generator reports a circuit b low condition. Generator output regulation may be impaired.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Sense wire shorted to groundCommon
- Open in sense wirePossible
- Pack cell imbalance approaching service thresholdLess likely
Parts involved
- Generator B
- Wiring Harness
- ECM
P2CC3 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.