P2C13 code meaning
B Camshaft Profile Actuator Position Sensor A Range/Performance Bank 1
Powertrain system Generic code P2Cxx codes Check engine light
What P2C13 means
P2C13 is the rationality test for the first exhaust profile actuator's feedback on bank 1, so the wiring is not in question. GM's L3B tracks every exhaust shift through exhaust Hall sensor 1: the reading must drop below 55 as the pin starts to fire, below 45 when it is fully out and climb above 68 once the pin is home again. If a commanded shift does not produce these states, or the sensor reports a pin event that was never requested, four bad readings out of five with the engine running and supply over 11 V result in a Type A fault (19OBDG03D, 25OBDG03B). The test is suppressed while crank or cam position faults are active. GM names P2C13 only in the keyword index of its L3B harness bulletins. Prime suspects are a sluggish pin, sludge or a worn exhaust sleeve groove.
P2C13 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 6 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2C13
- Warning lamp on at once
- Exhaust lift locked on one profile, cylinder deactivation inactive
- Occasional clicking from the top of the engine
Common causes of P2C13
- Most likelyPin of exhaust actuator 1 slow or sticking (sludge, overdue oil change, wrong oil grade)
- PossibleWorn shift groove or weak detent on the exhaust cam sleeve
- Less likelyHall element in actuator 1 delivering drifting levels
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 P2C13 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. |
| 13 | The exact fault in that area. |
What to do next
- Note P2C13 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 P2C13
What does P2C13 mean?
P2C13 means "B Camshaft Profile Actuator Position Sensor A Range/Performance Bank 1". P2C13 is the rationality test for the first exhaust profile actuator's feedback on bank 1, so the wiring is not in question. It is a generic code, so it means the same on every make.
Is it safe to drive with P2C13?
Drive gently and only to a workshop. With P2C13 the car can go into limp mode (reduced power) to protect itself.
Will P2C13 fail an emissions test?
Yes, it can. P2C13 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 P2C13 to fix?
Difficulty: medium. A typical repair takes 0.5 to 6 hours of work. This is a job for a workshop.
Will P2C13 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.