Powertrain, generic (extended)

P2C06 A Camshaft Profile Actuator Position Sensor A Range/Performance Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2C06 deals with a feedback signal that is electrically intact but makes no sense. On GM's 2.7 L L3B, the ECM follows each shift of the intake profile actuator A on bank 1 through three Hall feedback states: extending once the reading falls below 55, extended below 45 and retracted, back at home, above 68. The code is logged when these states do not appear as expected after a command, or when the feedback reports pin movement although no shift was requested. It needs 4 faulty readings out of 5 with the engine running, supply above 11 V and no crank or camshaft sensor faults, and it is a Type A fault (19OBDG03D, 25OBDG03B). CARB names a single pin that fails to move as a failure the lift monitor must cover. A sticking actuator is more likely than wiring here.

Likely causes

Actuator pin sticking or slow because of wear or dirty oil
Worn groove or sliding sleeve on the intake camshaft
Hall feedback element in the actuator giving wrong values

Symptoms

  • Check engine light on immediately
  • Lift switching disabled, engine stays on one cam profile
  • Possible ticking noise from the cylinder head

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–1,500
Time0.5–6 h

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

Parts involved

a camshaft profile actuator pos sensor a b1wiring harnessecm

Related codes

P2C05P2C07P2C08P2C0AP2B40

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