P2CC3Generator Voltage Sense Circuit B Low
- Generic OBD-II code · Powertrain
- How the car detects it
- P2CC3 is stored when generator sense circuit B reports a voltage below its lower limit, in practice often close to zero. Typical causes are an open sense lead, a blown fuse in it or a short to ground; on Chrysler alternators, according to Remy, an internal 2.4 kΩ resistor shields the sense terminal against such a ground fault. The risk lies in the regulation: if the controller believed a too-low reading, it would raise field current and overcharge the battery, which is why a controller that has recognised the fault can fall back to a substitute value or a fixed set point instead. No manufacturer documents P2CC3 publicly. CARB demands MIL monitoring of charging inputs only where emissions or other diagnostics depend on them. High signal: P2CC4; circuit A low: P063C.
- What you may notice
- Charging warning lamp on
- Charging voltage too high or held at a fixed value
- Overcharged battery, bright lights
- Likely causes
- LikelySense wire B broken or its fuse blown
- PossibleSense wire B chafed and shorted to ground
- PossibleCorroded sense terminal at the alternator or module
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.