P2C1D code meaning
B Camshaft Profile Actuator Position Sensor C Circuit High Bank 1
Powertrain system Generic code P2Cxx codes Check engine light
What P2C1D means
P2C1D, the circuit-high code for exhaust position sensor C on bank 1, covers a feedback line pulled towards supply voltage, usually by a short to power. No carmaker publishes a use for it. On GM's L3B the matching codes P2C15 and P2C19 are evaluated with the output off, a short being declared at a resistance up to 0.5 ohm against the controller supply; there they also appear in the main list of harness chafing bulletins. With only two exhaust Hall sensors on that engine, sensor C does not exist. CARB obliges every electrical input of a lift system to be checked for out-of-range values, so a future user would likely flag this fault with a warning lamp and freeze exhaust lift switching. Inspect the wiring for contact with live circuits first.
P2C1D 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 P2C1D
- Check engine light on
- Exhaust lift switching suspended
Common causes of P2C1D
- Most likelySensor C line rubbing against a powered wire
- PossibleInternal short to supply in the actuator
- Less likelyFaulty driver 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 c b1Wiring harnessECM
What each part of P2C1D 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. |
| 1D | The exact fault in that area. |
What to do next
- Note P2C1D 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 P2C1D
What does P2C1D mean?
P2C1D means "B Camshaft Profile Actuator Position Sensor C Circuit High Bank 1". P2C1D, the circuit-high code for exhaust position sensor C on bank 1, covers a feedback line pulled towards supply voltage, usually by a short to power. It is a generic code, so it means the same on every make.
Is it safe to drive with P2C1D?
Drive gently and only to a workshop. With P2C1D the car can go into limp mode (reduced power) to protect itself.
Will P2C1D fail an emissions test?
Yes, it can. P2C1D 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 P2C1D to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P2C1D clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.