P25DF"A" Camshaft Position Control 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
- P25DF belongs to the same block as the lock codes P25DD and P25DE, but it does not describe the latch itself. It flags that the intake phaser on bank 1 is not following its commanded angle as well as the calibration expects, judged as a check of control quality rather than as a plain deviation toward early or late timing (P0011, P0012) or a slow response (P000A). No manufacturer explains publicly where the line between P25DF and those older codes lies, so the exact trigger depends on the calibration. CARB 13 CCR 1968.2 asks every VVT system to detect both a missed target angle and sluggish movement. In hydraulic mid-lock phasers such as BorgWarner's for Hyundai, oil quality, the solenoid valve and the internal seals all decide how precisely the angle is held. Drivers notice uneven idle, hesitation or a drop in economy.
- What you may notice
- Check engine lamp on
- Uneven idle or slight hesitation when accelerating
- Somewhat higher fuel consumption
- Likely causes
- LikelyWorn or partly clogged oil control valve for the bank 1 intake phaser
- PossibleOil overdue, diluted or of the wrong grade
- RareInternal leakage in the phaser letting the angle drift
- 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 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.