P25E5"B" 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
- P25E5 reports that the exhaust camshaft actuator on bank 1 is controlled less precisely than intended: its angle lags, overshoots or oscillates around the target beyond calibrated limits, without a latch fault. It is the exhaust-side counterpart of P25DF and overlaps in meaning with P0014 and the slow-response code P000B; no manufacturer documents how P25E5 is told apart from them. CARB 13 CCR 1968.2 requires detection of missed targets and slow phasing for all VVT hardware. In a hydraulic phaser like those BorgWarner supplies for Hyundai's Gamma II, exhaust adjustment depends on cam torque pulses and on clean oil passages in the centre bolt valve, so oil condition and valve wear are the first checks. Drivers may notice unsteady idle, slightly reduced power or poorer economy.
- What you may notice
- Check engine lamp on
- Unsteady idle
- Slightly reduced power or economy
- Likely causes
- LikelyWorn or dirty control valve for the bank 1 exhaust phaser
- PossibleDegraded engine oil or a blocked oil filter
- RareNoisy exhaust camshaft position signal making the angle look unstable
- 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.