Powertrain, shared range

P34A4 A Camshaft Position Actuator Temperature Sensor Circuit Bank 1

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P34A4 flags an electrical problem of any kind in the temperature sensor circuit of intake camshaft actuator A on bank 1: a wire broken somewhere, a plug that has worked loose, or a value no valid window accepts. Such a sensor belongs to electrically driven phasers; an Aisin patent places it on the motor driver board and reduces motor current once that board stays hot. NTN-SNR lists P34A4 as the inlet-side temperature sensor with an electrical fault. Nissan uses this family on the electric intake valve timing of the 2018 Pathfinder and QX60 but only publishes the range codes P34A5 and P34A9; a public text on P34A4 itself is not known. Without a valid temperature the controller can no longer guard the motor and normally restricts phasing. Low and high faults are P34A6 and P34A7.

Likely causes

Plug at the actuator loose or corroded, sensor wire broken
Temperature sensor in the actuator or its electronics failed
Fault in the module that drives the electric phaser

Symptoms

  • Check engine light on
  • Intake cam phasing on bank 1 restricted or held in its base position
  • Often no noticeable change while driving

Repair estimate

DifficultyMediumDIY possible
Parts and labour€50–700
Time0.5–3 h

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

Parts involved

cam actuator a temp sensor b1sensor wiring

Related codes

P34A5P34A6P34A7P34A8P34B4

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