Powertrain, generic (extended)

P2C1D B Camshaft Profile Actuator Position Sensor C Circuit High Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

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.

Likely causes

Sensor C line rubbing against a powered wire
Internal short to supply in the actuator
Faulty driver stage in the ECM

Symptoms

  • Check engine light on
  • Exhaust lift switching suspended

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–900
Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

b camshaft profile actuator pos sensor c b1wiring harnessecm

Related codes

P2C1AP2C1BP2C1CP2C19P2C10P03F3

References: law.cornell.edu, gsi.ext.gm.com, gm-techlink.com.