P005B code meaning
B Camshaft Profile Actuator A Control Stuck On Bank 1
Powertrain system Generic code P00xx codes Check engine light
What P005B means
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.
P005B at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 10 hours
- Clears after repairAfter a drive cycle
Symptoms of P005B
- Check engine light on
- Rough idle and jerking at low engine speed
- Poor running when cold
- Misfire codes possible
Common causes of P005B
- Most 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
- Less likelySliding cam piece stuck in the high-lift position
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Camshaft profile actuator exhaust bank1Engine oilValve train
What each part of P005B means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 5B | The exact fault in that area. |
What to do next
- Note P005B and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P005B
What does P005B mean?
P005B means "B Camshaft Profile Actuator A Control Stuck On Bank 1". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P005B?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P005B fail an emissions test?
Yes, it can. P005B is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P005B to fix?
Difficulty: medium. A typical repair takes 0.5 to 10 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P005B clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.