Hi,
My 2003 e46 320d m47 Touring has been suffering from a very intermittent turbo boost issue. It's only happened a couple of times in the last 1000 miles. Basically I'm driving along and all of a sudden I go into a limp home mode, I have no boost, no errors on the dash and no matter how hard I put my foot down the instant MPG gauge doesn't drop like it usually does. As soon as I turn the ignition off and back on we're back to normal. The car has done 140k and I've done 60k of that. Serviced as per the indicator thing, driven quite hard and swirl flaps were done 30k ago.
I had the codes read today on an Autologic A020691 BMW v3.153.0, Main v6.6.0:
DDE d50m47b1
2 Faults
4191 Charge-air pressure actuator activation
4521 Charge-air pressure control, control deviation
The garage also did a boost pressure test, see attached pic, and said that all looks ok. There suggestion is a new turbo even though they think it's likely to be the electronic actuator.
Any thoughts please?
It's shameful to admit it but I recently bought a caravan and will be towing it around for the next 3 weeks through some hilly terrain so can't afford to be down on power, especially with wife and baby in the car. I should add that I have lost boost once while towing, only towed twice, but that the problems started before the caravan!
I'm based in Staffordshire.
Thanks,
Gerg
