P34C8Camshaft Position Control Module Performance
- 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
- P34C8 does not point at one actuator or bank; it says the separate controller for cam adjustment is not working properly in itself. Mitsubishi defines it for the 2022 Outlander: with the ignition on, the controller of the electric intake phaser detects an internal CPU error, and the module is the only listed cause. Fail-safe then parks the electric intake motor and the exhaust oil control solenoid at their reference angle, lets the runner flap open, stops EGR, drops stratified cold starts and runs idle at a set speed. Mercedes-Benz lists P34C800 for M176/M177 V8s as a general CAMTRONIC fault (LI05.20-P-080192), with a software update, newer actuators and a check for heat-damaged harness as remedy. Unlike P34C4 to P34C7, which judge one output stage, this code concerns the module as a whole.
- What you may notice
- Check engine light on
- Cam phasing held at its reference position
- Rougher cold start and fixed idle speed
- Noticeably less torque, higher fuel use
- Likely causes
- LikelyInternal processor fault in the cam adjustment control module
- PossibleOutdated control software (Mercedes M176/M177: update)
- RareModule supply or harness heat-damaged or with poor contact
- 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: €100 – €1,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.