P2C07 code meaning
A Camshaft Profile Actuator Position Sensor A Circuit Low Bank 1
Powertrain system Generic code P2Cxx codes Check engine light
What P2C07 means
On GM's 2.7 L turbo four L3B (Silverado and Sierra 1500 from 2019) each of the four intake sliding-cam actuators reports its pin travel through a Hall element; GM calls the first one intake Hall sensor 1, which is position sensor A in J2012 terms. P2C07 means this circuit is pulled to ground. The ECM checks it with the output stage switched on and treats an impedance of 0.5 ohm or less between signal and ground as a short; 4 failures in 5 samples with more than 11 V supply set a Type A code, MIL in the first trip (19OBDG03D, 25OBDG03B). GM bulletin 21-NA-149 names P2C07 only in its keyword list for chafed L3B engine harnesses. Pin feedback is lost, so lift switching and cylinder deactivation are blocked. Open circuit is P2C05, short to power P2C08.
P2C07 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 P2C07
- Check engine light on from the first drive
- Engine stays on one lift profile, no cylinder deactivation, slightly higher consumption
- With harness damage, possibly blown fuses and many further codes
Common causes of P2C07
- Most likelyEngine harness chafed through to ground, e.g. over the camshaft carrier cover
- PossibleInternal short to ground in the profile actuator or its Hall element
- Less likelyOil or water in the actuator connector bridging to ground
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 P2C07 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. |
| 07 | The exact fault in that area. |
What to do next
- Note P2C07 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 P2C07
What does P2C07 mean?
P2C07 means "A Camshaft Profile Actuator Position Sensor A Circuit Low Bank 1". On GM's 2.7 L turbo four L3B (Silverado and Sierra 1500 from 2019) each of the four intake sliding-cam actuators reports its pin travel through a Hall element; GM calls the first one intake Hall sensor 1, which is position sensor A in J2012 terms. It is a generic code, so it means the same on every make.
Is it safe to drive with P2C07?
Drive gently and only to a workshop. With P2C07 the car can go into limp mode (reduced power) to protect itself.
Will P2C07 fail an emissions test?
Yes, it can. P2C07 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 P2C07 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2C07 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.