Q: Engine fault reduced power

asked by on

I have a BMW 320d E90 2011. The option was not showing up on the model type. I get an intermittent engine fault running on reduced power message. Took it to get diagnosed and the fault code DTC 4755 showed up mentioning boost pressure actuator. Position control. The mechanic mentioned that the drainage system was blocked and there was moisture in the ECU. Dried it out but the problem persists. Any advice please? 30000 kms not miles.

My car has 30000 miles.
My car has an automatic transmission.

It sounds like you could have a sticking boost pressure actuator. Unfortunately, YourMechanic does not work on your model vehicle. I suggest having the dealership take a look at it.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Engine fault reduced power

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Problem of acceleration 2005 Pontiac Vibe

Hi - you may have a problem with the throttle position sensor performed by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and...

Q: Spotty / Sputtering Acceleration

At 60 thousand miles, your car should have had a major service that includes inspecting a lot of the parts that may be suspect. Spark plugs, filters, vacuum lines, would normally be checked and the problem might be located then....

Q: Throttle body position sensor

The rumbling noise may be coming from the loose catalyst in the exhaust piping. It would need to be verified by a road test to listen to the noise. If the catalyst is breaking up in the exhaust then the...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...