BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > Regional Forums > UK > UK Technical Forum > 335d power loss at WOT - FIXED

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      09-20-2012, 05:36 AM   #1
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335d power loss at WOT - FIXED

Update to previous thread:


in case it's of any help to anyone with the same problem.

I took the car into PMW at Chelmsford (would highly recommend) and they diagnosed a faulty exhaust back pressure sensor, which was causing the DPF to not regenerate.

I thought it was odd that I'd never felt it regen in the 6 months I'd owned the car.

As a consequence the DPF had become partially blocked, showing 50mb below maximum pressure. I'm told a first attempt to force a regen failed but a second attempt and extended roadtest did succeed and brought the back pressure to 180mb below maximum.

So all happy again now, they also carried out a smoke test on the vacuum system, confirming no leaks.
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      09-21-2012, 12:21 PM   #2
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Drives: 335d M sport 2007
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