Powertrain, generic (extended)

P2B3E B Camshaft Profile Actuator B Control Circuit High Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2B3E is set when the control circuit of exhaust camshaft profile actuator B on bank 2 is shorted to supply voltage. No manufacturer documents the code publicly, so the details come from the analogue: GM's L3B tests the bank 1 counterpart P2B3B while the output is off and treats 0.5 Ω or less towards controller power as a short. CARB's comprehensive component section asks for detection of shorts to high voltage on actuators of this kind. Realistic causes would be insulation damage that brings the wire against a powered line or a solenoid shorted internally. The engine keeps running, but bank 2 loses exhaust lift switching, which costs efficiency. Open and ground faults on the same actuator are P2B3C and P2B3D.

Likely causes

Damaged insulation bringing the control wire against a powered line
Solenoid in exhaust actuator B shorted internally
Output stage in the engine module faulty

Symptoms

  • Check engine light on
  • Exhaust lift on bank 2 fixed, slightly higher consumption

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–700
Time1–4 h

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

Parts involved

b camshaft profile actuator b b2wiring harnessecm

Related codes

P2B3CP2B3DP2B3BP2B38P002F

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