W211 2007 inlet port shut off motor or turbo actuator.

[boxer 01]

Good evening all, whilst on my way to work this morning my car would not rev over 2000 revs but no eml, but coming home as soon as I started the car the eml light came on but car was driving as it should. When I got home I plugged in my foxwell and it showed 2 faults, the inlet port shut off motor and the turbo actuator which is classed as a boost pressure regulator. I cleared the faults and then went for drive and no eml and car driving normally. A couple of months ago I had a violent shuddering issue and the exhaust back pressure sensor was replaced and the car has been fine since. I was wondering what the problem could be now, if it's a sticking shut off motor or the turbo actuator. If anyone has come across this issue on the w211 e320cdi 2007 plate I would be interested in their input.

 

[gusferlizi]

Good evening all, whilst on my way to work this morning my car would not rev over 2000 revs but no eml, but coming home as soon as I started the car the eml light came on but car was driving as it should. When I got home I plugged in my foxwell and it showed 2 faults, the inlet port shut off motor and the turbo actuator which is classed as a boost pressure regulator. I cleared the faults and then went for drive and no eml and car driving normally. A couple of months ago I had a violent shuddering issue and the exhaust back pressure sensor was replaced and the car has been fine since. I was wondering what the problem could be now, if it's a sticking shut off motor or the turbo actuator. If anyone has come across this issue on the w211 e320cdi 2007 plate I would be interested in their input.

Most likely both turbo actuator and swirl flaps motor are bad.

The Exhaust Backpressure sensor is a direct feedback fault for a bad turbo actuator. It might have gone away accidentally.

Clear the codes and unplug the airbox sensor (Atmospheric Pressure Sensor).

It will trigger an EML, but disables the EGR, swirl flaps and lowers boost. It should drive extremely happy, but less powerful.

See if the problem comes back.