P005BB Camshaft Profile Actuator A Control Stuck On Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- The camshaft profile actuator A switches the exhaust camshaft (camshaft B) on bank 1 between fixed cam profiles, usually a low-lift base profile and a high-lift profile. In most designs the unactuated state ("off") is the base profile; which profile counts as "on" is defined by the manufacturer. The control module does not need a position sensor to check the switchover: it detects the actual profile indirectly, for example from oil pressure in the switching gallery, intake pressure per cylinder or crankshaft speed fluctuations. This code is set when the base profile is commanded but the camshaft stays on the switched profile. Large lift and long opening at low engine speed cause rough idle and poor low-speed running.
- What you may notice
- Check engine light on
- Rough idle and jerking at low engine speed
- Poor running when cold
- Misfire codes possible
- Likely causes
- LikelyProfile switching solenoid stuck open, oil pressure is not released
- PossibleLocking pin does not return (weak spring, burr or dirt)
- PossibleOil pressure too high or drain from the switching gallery blocked
- RareSliding cam piece stuck in the high-lift position
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €80 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.