[e90bradm]

Recently ran into some troubles with my e90 335i. It all started with the electronics going haywire. Windshield wipers started going, Idrive stops working, throws every cel imaginable and eventually the motor stalls.

I thought it was the alternator going bad as I replaced the battery already but I did not have the time to inspect it myself. I went to take it to a shop to get checked out a day after and it drove fine for a few miles then did it again, but this time it wouldn’t start again.

The shop I took it too said that the battery, alternator, and fuses were fine. They told me it was a bad dme and possibly bad fuel injectors causing the problem. They had said it took 6 hours of diagnostics and didn’t seem so sure of it.

Trying to find out if anyone has experienced this or knows what’s going on. Any help is appreciated, thanks.

[MysticRob]

You register the battery?

[catcher22]

What codes are showing

[e90bradm]

I did not register the battery, but I did drive it for almost 2 years after replacing it with no problems. I didn’t realize at the time I was replacing it that I needed too.

Not sure what codes it is throwing at the moment

[e90bradm]

Codes are p10A5 and P10A8

Charged up the battery today and it started then immediately stalled. After that it will crank but still no start. I also unplugged the intelligent battery sensor and tried.

[Paanzerfaust]

Originally Posted by e90bradm

Codes are p10A5 and P10A8

Charged up the battery today and it started then immediately stalled. After that it will crank but still no start. I also unplugged the intelligent battery sensor and tried.

Are those BMW-specific codes you pulled with MHD or something similar that gives you the description? A quick Google Search doesn't show anything specific for those codes but does turn up results for injector issues for me. A quick read on here will show injectors do commonly go bad for the N54 so it's quite possibly that it's just that especially with your other symptoms.

If you have MHD you should code read with that and run the monitor app to see if you have signs of bad injectors, however I do unfortunately know from personal experience how sensitive our electrical system is. When the battery is low the car will shut down other systems (I'm unsure if it'd shut down injectors purposely but either way it's possible I guess), and registering & coding the battery is very important to prevent that, as well as having the IBS system connected. Unfortunately the IBS system is a perfect example of over-engineering in BMWs and can complicate a lot of things that shouldn't be, but I think it's more likely you have an actual injector problem.

[e90bradm]

I do not have an mhd flash. Codes were pulled by the repair shop. I’m not sure how faulty fuel injectors would cause the electrical problems, but I am sure I’m better off replacing them as I now have 175,000 miles on the car.

I pulled the DME, it is the MSD81. It does not appear to have any issues.

I am hoping someone in here has run into a similar issue and can help.

[Paanzerfaust]

You don't need an MHD tune to use the monitor and code reading function. If the shop isn't specialized in BMWs and just used a generic OBDII code reader then that doesn't help you much either. At least having MHD on your phone will give you specifics and the ability to self-diagnose rather than just throwing a couple grand at the car trying to solve it blindly.

I didn't say and definitely don't think bad injectors caused the electrical problems, but I was trying to imply that you likely have both a fueling and electrical problem from the sound of things. Whether it's injectors, fuel pump or something else is a shot in the dark without knowing what your codes are so your best bet is to either A: spend the $50 or whatever for the MHD monitoring license if you're looking for the easy way or B: look up how to install and use INPA, so either way you can get on the right track. The third option would be to go to a shop who focuses on BMWs specifically and has a lot of experience with e90s instead of older generations, but they're still going to re-tread the ground in regards to finding the BMW code and testing those same electrical system before finding a starting point so you might as well save yourself the money and do that part yourself.

Unfortunately with the information you currently have of "everything going haywire" with a good battery, alternator and fuses, and the engine stalling there just isn't enough specifics for an internet diagnoses because it could be a host of things.

[e90bradm]

I guess what I’ll do is get mhd and see what I can find from there. Thanks for the advice

[e90bradm]

So I got mhd and scanned the codes on my car..

2acc
2e7c
30ba
30bb

Shadow code: 2d5f reset

Seems like it would be an issue with the injector mosfets. The DME is an MSD81 and I checked the mosfets for continuity. Does anyone have a clue what’s going on? I’m worried I’ll buy another DME pay for it to be coded and still have the same problem.

Again any help is really appreciated, really need to get my car on the road.

[MarkN54]

Originally Posted by e90bradm

So I got mhd and scanned the codes on my car..

2acc
2e7c
30ba
30bb

Shadow code: 2d5f reset

Seems like it would be an issue with the injector mosfets. The DME is an MSD81 and I checked the mosfets for continuity. Does anyone have a clue what’s going on? I’m worried I’ll buy another DME pay for it to be coded and still have the same problem. I also have a shadow code 2d5f reset that’s my only code I have

Again any help is really appreciated, really need to get my car on the road.

Did you end up finding the issue I’m having the same problem car is acting all weird starts up then stalls and the car starts up on its own every weird just happens do to me today

[BeGood69]

Same issue 2D5F code.. did anyone found a solution or the source of this issue?