P2C1C code meaning
B Camshaft Profile Actuator Position Sensor C Circuit Low Bank 1
Powertrain system Generic code P2Cxx codes Check engine light
What P2C1C means
P2C1C is reserved for a circuit-low fault, typically a short to ground, in the feedback of exhaust position sensor C on bank 1. It is not used in any public manufacturer documentation. GM's L3B tables show how its siblings work: P2C14 and P2C18 compare the line against ground with the driver on and declare a short at 0.5 ohm or less in four of five samples. Because that engine carries only two exhaust Hall sensors, the C position is not populated. CARB's comprehensive component rules would require a manufacturer that fits a third exhaust actuator to detect such out-of-range input. If it ever appears, check for chafed insulation and moisture at the actuator plug before replacing parts.
P2C1C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2C1C
- MIL on
- No change of exhaust cam profile
Common causes of P2C1C
- Most likelySensor C wire chafed through to ground
- PossibleShorted actuator or position sensor
- Less likelyMoisture in the actuator connector
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
B camshaft profile actuator pos sensor c b1Wiring harnessECM
What each part of P2C1C 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. |
| 1C | The exact fault in that area. |
What to do next
- Note P2C1C 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 P2C1C
What does P2C1C mean?
P2C1C means "B Camshaft Profile Actuator Position Sensor C Circuit Low Bank 1". P2C1C is reserved for a circuit-low fault, typically a short to ground, in the feedback of exhaust position sensor C on bank 1. It is a generic code, so it means the same on every make.
Is it safe to drive with P2C1C?
Drive gently and only to a workshop. With P2C1C the car can go into limp mode (reduced power) to protect itself.
Will P2C1C fail an emissions test?
Yes, it can. P2C1C is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2C1C to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2C1C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.