P25DD"A" Camshaft Position - Stuck In Locked Position (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
- Many modern cam phasers hold their rotor with a spring-loaded pin at a defined angle, often in mid travel, so the engine starts with stable valve timing before oil pressure builds. P25DD means the intake phaser on bank 1 is still latched at that angle although the controller has asked it to unlock and move, so variable timing is lost on that camshaft. Ford's 2014 code list for the Boss 302S engine carries P25DD as a lamp code next to P25E0, P25E3 and P25E6. BorgWarner describes a passive mid-position lock on Hyundai's Gamma II engine that is released purely by oil flow, which is why thin, dirty or low oil and a sticking control valve are the usual suspects. CARB requires faults that keep the phaser from reaching its target to be detected. Expect weaker pull and higher fuel use.
- What you may notice
- Check engine lamp on
- Less pulling power, especially in the mid-speed range
- Higher fuel consumption
- Likely causes
- LikelyLow oil level or pressure, or oil of the wrong viscosity, unable to push the pin out
- PossibleOil control valve for the bank 1 intake phaser sticking or its screen clogged
- PossibleLock pin seized in its bore by sludge or wear inside the phaser
- 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: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.