P2CC4Generator Voltage Sense Circuit B High
- Generic OBD-II code · Powertrain
- How the car detects it
- P2CC4 indicates that generator sense circuit B reads above its upper limit. Either the line is shorted to a higher voltage, or the voltage at the measuring point really is excessive, for example because the regulator keeps the field fully energised; Remy warns that a full-field alternator can quickly push the system above 16 V. A meter separates the two cases: with the engine running, compare the sense voltage with the voltage directly at the battery posts. No manufacturer documents P2CC4 publicly. CARB does not require a MIL for charging inputs unless emissions or other monitors are affected, so the battery warning light is the more likely signal. Sustained overvoltage can damage lamps and electronics. Low signal: P2CC3; circuit A high: P063D.
- What you may notice
- Charging warning lamp on
- Very high system voltage, bulbs failing early
- Battery gassing or smelling
- Likely causes
- PossibleRegulator of alternator B stuck in full field, real overvoltage
- PossibleSense wire B shorted to a higher-voltage line
- RareSense input of the engine control module faulty
- Repair
- Medium · Usually a job for a workshop.Typical cost: €20 – €700
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.