P2C08 code meaning
A Camshaft Profile Actuator Position Sensor A Circuit High Bank 1
Powertrain system Generic code P2Cxx codes Check engine light
What P2C08 means
P2C08 flags a short to voltage on position sensor A, the Hall feedback of the first intake profile actuator on bank 1. GM's L3B 2.7 L four runs this check the other way round from the ground test: the output stage is switched off, and if the line still shows 0.5 ohm or less towards controller power, 4 of 5 such readings above 11 V store a Type A code with immediate MIL (19OBDG03D, again 25OBDG03B). Unlike the ground fault P2C07, P2C08 sits in the main code list of GM bulletins PIT5677 (2019) and 21-NA-149 (2019 to 2021 Silverado and Sierra 1500), which blame engine harness damage over the camshaft carrier and near the left shock tower and mention blown fuses. Lift switching stops until the fault is cleared. Open circuit: P2C05.
P2C08 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 P2C08
- MIL lit immediately
- No valve lift change and no cylinder deactivation
- After harness damage also rough running, reduced power or no start
Common causes of P2C08
- Most likelyChafed engine harness touching a live circuit (GM bulletins PIT5677, 21-NA-149)
- PossibleInternal short to supply inside the actuator or its feedback element
- Less likelyFaulty 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
A camshaft profile actuator pos sensor a b1Wiring harnessECM
What each part of P2C08 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. |
| 08 | The exact fault in that area. |
What to do next
- Note P2C08 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 P2C08
What does P2C08 mean?
P2C08 means "A Camshaft Profile Actuator Position Sensor A Circuit High Bank 1". P2C08 flags a short to voltage on position sensor A, the Hall feedback of the first intake profile actuator on bank 1. It is a generic code, so it means the same on every make.
Is it safe to drive with P2C08?
Drive gently and only to a workshop. With P2C08 the car can go into limp mode (reduced power) to protect itself.
Will P2C08 fail an emissions test?
Yes, it can. P2C08 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 P2C08 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2C08 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.