Powertrain, generic · Ignition system or misfire

P03EE A Camshaft Profile Actuator C Control Circuit High Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

With a sliding camshaft, the intake camshaft (camshaft A) carries movable cam pieces with several lift profiles; solenoid actuators shoot a pin into a groove in the piece and shift it axially. Actuator C is the third of these actuators – not a profile position. The only known user is GM's 2.7-litre turbo four (L3B, three-step sliding cam, from model year 2019). P03EE means the control circuit is shorted to the supply voltage: GM checks with the driver off and sets the code at 0.5 Ω or less between signal and supply (4 of 5 samples, above 11 V, MIL on the first trip). The actuator can then not shift its cam piece, and lift switching and cylinder deactivation are blocked.

Likely causes

Control wire shorted to battery voltage
Short between supply and control pin in the connector (water, corrosion)
Internal short in the actuator
Driver in the engine module

Symptoms

  • Check engine light on
  • Lift switching and cylinder deactivation blocked, higher consumption
  • Possibly rough running if a cam piece stays in the wrong position

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–600
Time0.5–2.5 h

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

Parts involved

camshaft profile actuator c intakesliding camshaftactuator wiringengine control module

Related codes

P03ECP03EDP03F3P001CP037C

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