P2CC1 code meaning
Generator Voltage Sense Circuit B
What P2CC1 means
P2CC1 is the general fault of a second sense line through which the engine controller reads the actual charging voltage. In the charging system, generator means the alternator; a sense input taps the voltage at the rectifier or battery without load current, so wiring losses do not distort it. Remy describes such a Kelvin sense lead on Chrysler alternators, connected straight to the rectifier plate behind a 2.4 kΩ protective resistor; that terminal is labelled B, which is not the circuit letter of this code. A circuit B is presumably needed only where a second alternator or measuring point exists. No manufacturer documents P2CC1 publicly; Deutz, for example, lists only circuit A codes (P063A, P063C, P063D) for its alternator. Range, low and high: P2CC2 to P2CC4.
P2CC1 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2CC1
- Battery or charging warning lamp on
- Charging voltage regulated to a fixed or unsuitable value
Common causes of P2CC1
- Most likelySense wire B, its fuse or connector open or corroded
- PossibleSecond alternator or its regulator faulty
- Less likelySense input in the engine control module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Generator voltage sense circuitAlternatorWiring harness
What each part of P2CC1 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| C | Area: hybrid propulsion. |
| C1 | The exact fault in that area. |
What to do next
- Note P2CC1 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2CC1
What does P2CC1 mean?
P2CC1 means "Generator Voltage Sense Circuit B". P2CC1 is the general fault of a second sense line through which the engine controller reads the actual charging voltage. It is a generic code, so it means the same on every make.
Is it safe to drive with P2CC1?
P2CC1 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P2CC1 fail an emissions test?
P2CC1 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P2CC1 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P2CC1 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.