P2DF1Intake Valve Lift Range/Performance Bank 2
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2DF1 is the bank 2 counterpart of P2DF0 and therefore only appears on V engines or boxers, on the side without cylinder 1. Nissan's VVEL, used on the VQ37VHR V6 and on V8 engines, is a good example: on the 2014 QX80 V8 both banks carry a separate VVEL ladder assembly with an actuator and a control shaft position sensor. Infiniti's bulletin ITB14-041 for the 2014 QX80 warns never to loosen the ladder adjusting bolts or the sensor mounting bolts, because the cam lift stroke then goes out of adjustment and ladder plus cylinder head must be replaced. A wrong reading from that sensor or a binding shaft therefore shows up as a lift error on one bank only. No manufacturer documents P2DF1 publicly; under CARB's VVT section the lift system must be watched for both kinds of deviation.
- What you may notice
- Check engine light on
- Uneven running between the banks, possible fuel trim difference
- Reduced power
- Likely causes
- LikelyControl shaft or ladder assembly on bank 2 binding
- PossibleControl shaft position sensor on bank 2 moved or faulty
- PossibleLift actuator motor of bank 2 weak
- RareOil sludge in the bank 2 lift mechanism
- 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.