Powertrain, shared range

P34AC A Camshaft Position Actuator Position Sensor A Circuit Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P34AC covers any electrical fault in the circuit of position sensor A of the intake cam actuator on bank 1. On engines with an electric intake phaser this sensor tells the controller where the drive motor stands. Mitsubishi has the code in its 2022 Outlander manual: the electric intake valve timing module logs it when the sensor voltage is too low or too high for one second or longer, and names wiring with an open or short as well as the actuator itself. In fail-safe the phaser is parked at its base angle, the intake runner valve opens, EGR stops and the cold-start stratified mode is dropped. The check runs once the engine has been above 2,000 rpm for a second and first appears as a pending code. Low and high are P34AE and P34AF.

Likely causes

Actuator harness open or shorted, plug loose
Position sensor in the electric actuator failed (actuator replacement)
Electric valve timing control module faulty

Symptoms

  • Check engine light on
  • Intake cam held in its base position, less torque at low revs
  • Rougher cold start, slightly higher consumption

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–900
Time0.5–3 h

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

Parts involved

cam actuator a pos sensor b1sensor wiring

Related codes

P34ADP34AEP34AFP34B0P34C8P2B3F

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