P34B5B Camshaft Position Actuator Temperature Sensor Range/Performance Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P34B5 is the rationality check for the temperature reading of exhaust-side actuator B on bank 1: the circuit is intact, yet the value or its behaviour is not believable. CARB asks for such checks on VVT input sensors wherever feasible, ideally catching readings that are wrongly high as well as wrongly low. How a carmaker judges this reading is not public, and no maker publishes P34B5 at all. The intake twin P34A5 shows a likely pattern: Nissan traced cold-start alarms on the 2018 Pathfinder to module software and cured them with an update. The value matters because, in Aisin's patent, a board temperature above a release threshold for a set time moves the phaser off its end stop to cut holding current. Bank 2: P34B9.
- What you may notice
- Malfunction indicator lamp, sometimes only after a cold start
- No noticeable change in engine behaviour in most cases
- Likely causes
- PossibleModule software judging the value wrongly (update available?)
- PossibleTemperature sensor in the actuator drifting
- RareLoose contact shifting the reading
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.