Powertrain, shared range

P34A9 A Camshaft Position Actuator Temperature Sensor Range/Performance Bank 2

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

P34A9 covers the plausibility check of the temperature sensor at intake cam actuator A on bank 2. Nissan names it together with P34A5 in bulletins NTB18-016 (2018 Pathfinder) and ITB18-009 (2018 QX60): vehicles built before 18 December 2017 could store one or both codes and switch on the MIL when started in freezing weather. Nissan traced this to the electric intake valve timing control module and first replaced the module with one carrying newer software; a later revision moved the fix to a reprogramming campaign. If P0021 or other timing codes are stored, they take priority. Outside this case, a sensor whose reading wanders or a poor contact at the bank 2 actuator are the candidates. Bank 1 is P34A5.

Likely causes

Module software (Nissan 2018 Pathfinder/QX60, reprogramming)

Sensor reading wandering or slow

Poor contact at the bank 2 actuator plug

Symptoms

Check engine light on after a start in freezing weather
Engine runs normally in most cases

Repair estimate

DifficultyMediumWorkshop job

Parts and labour€80–900

Time0.5–2.5 h

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

Parts involved

cam actuator a temp sensor b2

Related codes

P34A8 P34AA P34AB P34A5 P0021

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