Engine Shutting Off

[jarrett]

Hey guys,

New e90 M3 (DCT) owner here, since March. Been loving the car but had an issue pop up recently.

So twice in the last couple months my car has turned off on its own. Luckily both times I was in stop and go street traffic and was able to turn it back on. The first time it happened I thought I may have clipped the Start/Stop button but just now I definitely didn't as my hands were nowhere near the button.

1) I'll be sitting with my foot on the brake in traffic, switch over to tap the throttle
2) Engine turns off and goes to Neutral
3)
4) Press the Start/Stop button again and it starts back up
5) Wave apologetically at the people behind me

When this happens there is no error message of any kind.

After doing some searching I see it might be the crankshaft sensor. Does that seem like the most likely culprit?

Any help/advice/words of wisdom would be very appreciated. As well as a good M3 mechanic in SoCal, although I can probably find that in the SoCal forums.

Thanks!

[roastbeef]

i'm not 100% sure what is causing your problem, but if you looking for a good mechanic in socal, give malek at mrf engineering a call.

[rich4life611]

Did you just fill up gas by chance? Had an issue where every time I? filled the gas the rpms would jump up and down a bit and then the car would shut off.

[JsL]

Originally Posted by rich4life611

Did you just fill up gas by chance? Had an issue where every time I? filled the gas the rpms would jump up and down a bit and then the car would shut off.

If you haven't resolved your problem, you need to replace the fuel tank breather valve.

http://www.bimmerfest.com/forums/#/topics/700692?page=1

[JsL]

Originally Posted by jarrett

Hey guys,

New e90 M3 (DCT) owner here, since March. Been loving the car but had an issue pop up recently.

So twice in the last couple months my car has turned off on its own. Luckily both times I was in stop and go street traffic and was able to turn it back on. The first time it happened I thought I may have clipped the Start/Stop button but just now I definitely didn't as my hands were nowhere near the button.

1) I'll be sitting with my foot on the brake in traffic, switch over to tap the throttle
2) Engine turns off and goes to Neutral
3)
4) Press the Start/Stop button again and it starts back up
5) Wave apologetically at the people behind me

When this happens there is no error message of any kind.

After doing some searching I see it might be the crankshaft sensor. Does that seem like the most likely culprit?

Any help/advice/words of wisdom would be very appreciated. As well as a good M3 mechanic in SoCal, although I can probably find that in the SoCal forums.

Thanks!

No check engine light? Try scanning for pending codes.

[jarrett]

Originally Posted by JsL

If you haven't resolved your problem, you need to replace the fuel tank breather valve.

http://www.bimmerfest.com/forums/#/topics/700692?page=1

The first time it happened I can't remember, but YES! Last night I had just filled up the tank and it happened a few minutes later.

Thank you guys so much! I was super worried as it seemed like a really weird thing to happen, especially with no error message coming up.

[jarrett]

Originally Posted by roastbeef

i'm not 100% sure what is causing your problem, but if you looking for a good mechanic in socal, give malek at mrf engineering a call.

Thank you for the recommendation!

[MPower7]

Might want to check out the battery cable recall too.