P2DF0Intake Valve Lift Range/Performance Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2DF0 means that intake valve lift on bank 1 as a whole does not follow the command, rather than one cylinder. Continuously variable systems explain why: BMW's Valvetronic turns an eccentric shaft with an electric motor controlled by the DME, moving an intermediate arm between camshaft and rocker, while Nissan's VVEL uses a DC motor to rotate a control shaft; one shaft sets lift for all cylinders it serves, so a stiff shaft, worn motor or wrong position reading hits them together. A Bosch patent checks lift plausibility by comparing the air flow predicted from valve lift and engine speed, plus a tolerance, with the air mass meter. No manufacturer documents P2DF0 publicly; CARB requires checks for both wrong and late lift. Bank 2 is P2DF1, the whole system P2DF2.
- What you may notice
- Check engine light on
- Reduced power, engine may fall back to throttle control
- Rough idle across several cylinders
- Likely causes
- LikelyEccentric or control shaft on bank 1 stiff from wear or sludge
- PossibleLift adjusting motor of bank 1 worn or weak
- PossibleShaft position sensor reading offset or loosened
- RareAir mass meter error or intake leak making the lift appear wrong
- 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: €200 – €4,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.