BMW F01 F02 SECURITY ALARM RANDOMLY GOES OFF/ PANICS PLEASE HELP

306 Views 14 Replies 5 Participants Last post by ashleyroachclip27, 2 d ago

dimagli

Discussion Starter · 7 d ago

2

hello guys, i have a 2014 bmw 750li and recently stumbled upon a very annoying problem with my car. after locking the car, sometimes (often and randomly) the alarm will start to panic as if someone is trying to break in. i have scanned for codes and only thing im showing is 801c10, 801c11, 801c12, and 800ed1(this last code there is zero info online about it) i have replaced the hood sensor, the battery in my key fob, and also i checked my car battery and voltage is good(12.16v not started) please help

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TheNine90

· #2 · 6 d ago

It might be a faulty door contact switch. You can read out what caused alarm activation and condition when alarm was activated using ISTA. Not sure about you tool

dimagli

Discussion Starter · #3 · 6 d ago

TheNine90 said:
It might be a faulty door contact switch. You can read out what caused alarm activation and condition when alarm was activated using ISTA. Not sure about you tool

Thank you, would it be the door handle for keyless entry or it can be the main door harness plug?

TheNine90

· #4 · 6 d ago

From the fault code it looks like the door contact not the handles. You can try reading live data and check the switches.

dimagli

Discussion Starter · #5 · 6 d ago

thank you for reply, thats the wierd part becuase i checked and everything on the door works perfect and no glitches(mirror, window, keyless entry). also i would like to mention this car only has 53k miles and prevous owner babied it. its in prestige condition inside and out. today there was another fualt that came up - "battery discharging while stopped". also i have no issues with the power, the car starts up perfect no lags no sign of the battery struggling to output power.

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QSilver7

· #6 · 3 d ago

That message is telling you that your main battery is going into a low discharged state…and if you start the car, the car’s charging system should help if it’s something minor.

You mentioned in the original post that the battery’s voltage was at 12.6v (not started). But the warning you just posted says something is draining the battery…which is why it is suggested you start the engine.

And if the battery voltage drops low…this can be interpreted as someone trying to disconnect the battery…so if the car is locked…this can be why it set off the alarm.

Check the health of your car’s battery to rule it out as a possible culprit.

dimagli

Discussion Starter · #7 · 3 d ago

Thank you for the insight. I have had some previous cars before(not bmw) that have had a weak battery, and the symptoms were very transparent. With this f02, there are no symptoms. It starts great right away even if I play radio and keep lights on for 10 mins. I am assuming I get the error message bc I have stopped locking my car(don’t want to piss my neighbors off with the alarm going in full panic mode) and when I don’t lock the car, it goes into “shutdown” or “power save mode” so this is an endless cycle all due to a stupid alarm. Don’t know will keep digging. I wonder if anyone else had this issue before

Robin750

· #8 · 3 d ago

3

That fault code for passenger door contact multiple wake-up seems like a good place to start, it would both prevent the car from going to sleep (causing the battery discharge warning, as if you kept opening and closing the door) and it can certainly be a trigger for the alarm to go off.

I was about to ask you about previous history of the vehicle but a quick search of the VIN revealed that it was a salvage vehicle. I hope this isn't news to you, but I do see an even bigger red flag because there are signs that someone doctored it for the auction. The chrome trim on the front bumper can only be found on early M Sport models (ie. 2010) or those ordered with M Sport but without shadowline trim (very unusual for the US market). The passenger side headlight is also significantly more faded than the other side and there are no other body shop markings anywhere other than that X on the hood.

I guess what I'm saying is that your problem is likely specific to your vehicle and related to the accident, such as damaged wiring. I would suggest getting ISTA (you will need better diagnostic capability and also wiring diagrams) and verify the signal from the door switch, as well as the wiring to FRM (in the driver's footwell).

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dimagli

Discussion Starter · #9 · 3 d ago

Yes I am aware of the salvage title, I actually bought this one from the auction and fixed it myself. It had 44k miles and I had zero issues with it up until now. Also I thought it was the door handle, I changed it, and still the alarm would go off. So that can’t be the issue

ashleyroachclip27

· #10 · 3 d ago

The latch is what makes the circuit for the alarm and the car going to sleep , not the handle .

dimagli

Discussion Starter · #11 · 2 d ago

ashleyroachclip27 said:
The latch is what makes the circuit for the alarm and the car going to sleep , not the handle .

Oh wow I had no idea, ok I’ll try changing and I’ll come back for update

Robin750

· #12 · 2 d ago

dimagli said:
Oh wow I had no idea, ok I’ll try changing and I’ll come back for update

It's the part highlighted in the link below. Make sure you confirm the part number as you need one for soft close doors, the same part is used on the F10 5-series which may not have soft close.

https://www.realoem.com/bmw/enUS/showparts?id=YE83-USA-05_2011_F02N_BMW_750Li&diagId=51_7783#51217185692

Hall sensors tend to be quite reliable, which was why I didn't immediately suggest replacement (lack of search results for that fault code is another hint). Did you find more damage to the front passenger side while fixing?

dimagli

Discussion Starter · #13 · 2 d ago

I actually work at an auto recycling yard, so it doesn’t cost me anything to try out different parts other than my time, and we happen to have a few parts cars just like mine. So I’ll change it over the weekend and see how it goes. There was no damage to passenger side other than the front end/front of fender. Previous owner hit a deer. Also as I’ve mentioned before, it can’t be “accident” related as I have put almost 10k miles on this car and only now I’m having issues with the alarm. More than likely an electrical component that took a crap for whatever reason

Robin750

· #14 · 2 d ago

dimagli said:
I actually work at an auto recycling yard, so it doesn’t cost me anything to try out different parts other than my time, and we happen to have a few parts cars just like mine. So I’ll change it over the weekend and see how it goes.

Got it, that makes a lot of sense!

ashleyroachclip27

· #15 · 2 d ago

Cleaning connectors may be you answer .
Car sits unused , things happen ...

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