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Replaced the MAF this morning, instead of air mass too small i got air mass too high (same error as a boost leak would be).
Reset the error using bimmerlink, it came back on right away next engine start. I then took the battery off for 15 mins (negative black terminal) after i cleared the error again, drove the car for 15 miles since and scanned the car after 2-3 restarts and it hasnt shown again, i still have the glow plug error showing though but obviously this doesnt throw a warning light on the dash.
I also cleaned the EGR valve (and verified it wasnt sticking) it was sooty but not that bad really. I will be attempting a throttle body and intake clean as soon ass weather picks up.
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