P2C15 code meaning
B Camshaft Profile Actuator Position Sensor A Circuit High Bank 1
Powertrain system Generic code P2Cxx codes Check engine light
What P2C15 means
P2C15 stands for a short to voltage on the exhaust position sensor A circuit, bank 1, i.e. the Hall feedback of GM's first exhaust actuator on the L3B four. This test runs with the output switched off: if a resistance of 0.5 ohm or less to controller power remains on the line, four failed reports in five at more than 11 V produce a Type A code, MIL at once (19OBDG03D, 25OBDG03B). P2C15 belongs to the main code list of PIT5677 and of 21-NA-149 for 2019 to 2021 L3B trucks. From the A revision on, these bulletins also mention blown underhood fuses alongside no-start, rough running and reduced power, so a short to power is often only one symptom of a larger harness fault. Exhaust lift changes stop. Open: P2C12, ground short: P2C14.
P2C15 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 P2C15
- MIL lit straight away
- Exhaust cam profile stays fixed
- Together with harness damage, blown fuses, no start or reduced power possible
Common causes of P2C15
- Most likelyChafed harness letting the sensor line touch a supply wire (GM PIT5677, 21-NA-149)
- PossibleShort to supply inside exhaust actuator 1
- Less likelyDefective output stage in the ECM
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 a b1Wiring harnessECM
What each part of P2C15 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. |
| 15 | The exact fault in that area. |
What to do next
- Note P2C15 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 P2C15
What does P2C15 mean?
P2C15 means "B Camshaft Profile Actuator Position Sensor A Circuit High Bank 1". P2C15 stands for a short to voltage on the exhaust position sensor A circuit, bank 1, i.e. It is a generic code, so it means the same on every make.
Is it safe to drive with P2C15?
Drive gently and only to a workshop. With P2C15 the car can go into limp mode (reduced power) to protect itself.
Will P2C15 fail an emissions test?
Yes, it can. P2C15 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 P2C15 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2C15 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.