Powertrain, shared range

P34AF A Camshaft Position Actuator Position Sensor A Circuit High Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P34AF is logged when position sensor A on the bank 1 intake phaser reports a voltage above its upper limit for at least one second. Mitsubishi covers the code in its 2022 Outlander manual and, besides the harness, points to the Hall sensor of motor 1 in the electric actuator – a hint that position sensor A is a Hall element inside the phaser motor. A broken ground lead of the sensor, a signal line in contact with supply voltage or a dead Hall sensor are the usual causes; since the sensor is built into the actuator, a sensor fault normally means a new actuator. Fail-safe parks the intake phaser at its base angle, opens the intake runner valve and switches off exhaust gas recirculation. Low is P34AE, bank 2 P34B3.

Likely causes

Sensor ground open or plug corroded
Signal wire shorted to supply voltage
Hall sensor of the actuator motor failed (actuator replacement)

Symptoms

  • Check engine light on
  • Intake phaser held in its base position, reduced power
  • Slightly higher fuel consumption

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–900
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

P34ACP34ADP34AEP34B3P2B42

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