P34C1B Camshaft Position Actuator Position Sensor A Range/Performance Bank 2
- 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
- Mercedes-Benz names P34C109 for the exhaust side of bank 2 on its CAMTRONIC V8s: the signal from the sensor at solenoid 1 is wrong although the circuit is intact, entered as a component fault. CARB explains why such a check exists, since even a single cylinder pin on a lift mechanism not moving into place is a failure mode that VVT monitoring has to cover. The same bulletin, LI05.20-P-080192, also carries P005C (solenoid 1, exhaust, bank 2: faulty or jammed off) and P164B (CAMTRONIC limp-home). The Mercedes remedy: engine software, current actuator part numbers, and a look at the harness for heat damage. Because the solenoid sensor is integrated, a confirmed fault calls for replacing the actuator. Bank 1 counterpart: P34BD.
- What you may notice
- Check engine light on
- CAMTRONIC limp-home, often together with P005C
- Likely causes
- LikelyCAMTRONIC actuator of an older part number (Mercedes: replace)
- LikelyEngine control software needs an update
- PossibleActuator pin sticking or moving too slowly
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.