Bmw n54 limp mode no codes The problem is that I had enabled auto code clearing and any codes that came up were erased so I cannot see what the problem is. Every so often, while merging/passing or during a pull, I get that “dreaded engine malfunction: power reduced” warning (limp mode) pop up. Had the codes checked today at my old work, no codes. At the next red light I shut it off and start it back up, no more limp mode. I ran the codes and got 30FF underboost and 2AAF: fuel pump plausibility. I've researched the problem and it really could be a bunch of different things. It throws no codes and no check engine lights. 5-4k under moderate to heavy acceleration is usually boost leak related. If I turn the car off and then turn it back on, everything is fine again. Hard to say without more specific codes, but limp mode around 3. When I initially bought the car 2 weeks ago during the test drive I could clearly hear the turbos and BOV that the PO installed. . The car goes into limp mode and idles very rough. Mar 22, 2017 · Lately, it did feel like I was having misfire or light popping sound when I gun it and shift at high RPMs (Automatic tranny) so I have no clue what that light popping/backfire sound is coming from. I’ve scanned the Car with the MHD app and have received the following codes. At the next red light I shut it off and start it back up, no more limp mode. On my way home I drive it kind of hard, trying to recreate limp mode and succeeded, looked down and my oil temp is only at 250, never above. The VANOS error codes come and go, on the last scan I did they appeared again (new codes posted below). It will do it after a WOT pull and after about 30 or so minutes of driving. You mentioned you don't feel power loss, but can you feel any boost kick in at all when when pulling through the RPM range? Feb 16, 2021 · 2008 335i N54 limp mode with no new engine codes :) So clearly I'm a new e90 owner the car is sitting on 205k km, just replaced the waterpump and thermostat yesterday. Now I'm not hearing the BOV as much as I used to. I doubt all three injectors can go bad at the same time, besides, when the Car is turned off, and on again, it works perfectly fine until accelerated. Oct 28, 2025 · This comprehensive guide will explain everything you need to know about BMW limp mode including the common causes, symptoms to look for, diagnostic tips, and both DIY and professional repair solutions to get your BMW back up and running at full speed again. Oct 29, 2023 · When i went to inspect it, i brought my generic code reader along to check the issues, and it came up with p0015. Here's the odd part. Feb 15, 2024 · Any time I accelerate above 3000 RPM. While driving home my car essentially goes into Limp mode. The strangest thing is it only happens once and a while. It has done it 3 times over the last week. Nov 29, 2021 · The thermostat and water pump codes are gone and no coolant leaks so that's a plus. Everything was ok and I was able to drive home, albeit in limp mode. hosv trfyoi euxmcpddn kmghcuz iicl xzq msaz kzyx okdpa xdn rtnvqkjx rme wnf cxpj cws