Powertrain, generic (extended)

P2B3C B Camshaft Profile Actuator B Control Circuit/Open Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

This code reports an interrupted control circuit at actuator B on the exhaust camshaft (camshaft B) of bank 2. No vehicle manufacturer is known to use P2B3C in public documents. Its bank 1 twin P2B39 appears in GM's tables for the 2.7-litre L3B, an inline engine without a second bank, where an impedance of 200 kΩ or more with the output on counts as open. Audi's later 2.0 TFSI applies its valvelift system to the exhaust valves, which shows that exhaust lobe switching is in production, but that engine also has a single bank. CARB's requirement for circuit monitoring of output components is the basis. An unplugged connector, a broken lead or an open solenoid coil will stop the exhaust sleeve on bank 2 from moving.

Likely causes

Connector of the bank 2 exhaust actuator unplugged or loose
Broken lead to the actuator
Open coil in exhaust actuator B

Symptoms

  • Check engine light on
  • Exhaust lift on bank 2 no longer switches

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–700
Time0.5–3 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

P2B3DP2B3EP2B39P2B36P002DP2B52

References: law.cornell.edu, gsi.ext.gm.com, audi-technology-portal.de.