Powertrain, shared range

P34C3 B Camshaft Position Actuator Position Sensor A Circuit High Bank 2

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P34C3 completes the sensor group of actuator B: on bank 2, sensor A watching the exhaust-side actuator puts out a voltage beyond its permitted range. A broken sensor ground, an open signal path or contact with a feed line are the usual causes. No manufacturer publishes P34C3. Mercedes-Benz, whose CAMTRONIC V8 uses neighbouring codes on this bank (P34C1, P34C2), lists no high fault, and the 2022 Mitsubishi Outlander has no electric exhaust actuator at all – its exhaust camshaft is shifted through an oil control solenoid that the fail-safe fixes in its reference position together with the electric intake motor. Until the cause is found the bank 2 exhaust adjustment stays in its default state, so drivers mainly see the warning lamp. Bank 1: P34BF.

Likely causes

Sensor ground on bank 2 broken
Signal line in contact with a supply wire
Sensor in the bank 2 exhaust actuator faulty

Symptoms

  • Malfunction indicator lamp lit
  • Bank 2 exhaust adjustment held in base position

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–1,300
Time0.5–4.5 h

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

Parts involved

cam actuator b pos sensor b2sensor wiring

Related codes

P34BFP34C0P34C1P34C2P34B3P2B4E

References: law.cornell.edu, ntn-snr.com, static.nhtsa.gov, mitsubishitechinfo.com.