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chadillac2000 chadillac2000 is offline
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Posts: 609
Join Date: Jul 2011
Car: 2008 535i
Default 03-04-2019, 02:30 PM

Trims stuck at 25 are usually indicative of o2 sensor failure. It also means you're in open loop fueling, which is not good for any type of WOT situation as your ECU isn't taking into account the o2 readings. Surprised you aren't getting codes though. Does fueling enter back into closed loop and get unstuck when you come off WOT? How many miles and what brand are the o2 sensors you have currently installed?

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