Crank but no start ONLY when hot OUTSIDE 80F

Atrocitus · 09-01-2018, 10:15 PM

Ok, so I have a 2011 335i Xdrive N55. I have been running into the issue of coming out from work on hot days (hot for Washington state, about 80F give or take) and going to start my car and it JUST cranks then I get 5 malfunctions always the same ones. "AWD and DSC malfunction!, Malfunction in transmission, DBC malfunction! Drive carefully, Start-off assistance inactive!, Fuel pump!" I have added a pic of my idrive showing these issues. HOWEVER, as soon as the temp from the days goes down the car starts right up and has absolutely 0 issues like none what so ever. The car starts just fine in the mornings, at night. Any time the weather is cool purrs like a kitten. I replaced both k6300 relays. I have swapped out the battery and had it programmed. I have tried reading codes (none). This is driving me crazy. I have only had the car for 11 months. I could really use some help.

nsjames · 09-03-2018, 03:22 PM

you should post in the general forum.

this is just for specific xdrive related issues.

but it sounds like something is taking down the can-bus and the entire car is freaking out over it.
you need some sort of diagnostic capability. kcan+ista is the cheapest/best route.

B0z0 · 09-13-2018, 03:18 PM

I have an 09 e92 sulev that would stall in similar situations. My iDrive told me the same thing. The factory fuel pump control modules overheat so I was losing fuel pressure. It might be worth looking into, although my fix was to remove the seat bolster and leave it open so it can cool off easier. I never had a problem after that, but it was def ghetto. Hopefully this helps!

paulv824 · 10-18-2018, 07:20 AM

Just for good measure i would check the motor ground straps. ive had a similar issue.

09-01-2018, 10:15 PM	#1
Atrocitus New Member 0 Rep 11 Posts Drives: 2011 335i XDrive Join Date: Oct 2017 Location: Tacoma, Wa iTrader: (0)	Crank but no start ONLY when hot OUTSIDE 80F Ok, so I have a 2011 335i Xdrive N55. I have been running into the issue of coming out from work on hot days (hot for Washington state, about 80F give or take) and going to start my car and it JUST cranks then I get 5 malfunctions always the same ones. "AWD and DSC malfunction!, Malfunction in transmission, DBC malfunction! Drive carefully, Start-off assistance inactive!, Fuel pump!" I have added a pic of my idrive showing these issues. HOWEVER, as soon as the temp from the days goes down the car starts right up and has absolutely 0 issues like none what so ever. The car starts just fine in the mornings, at night. Any time the weather is cool purrs like a kitten. I replaced both k6300 relays. I have swapped out the battery and had it programmed. I have tried reading codes (none). This is driving me crazy. I have only had the car for 11 months. I could really use some help.
	Appreciate 0 Tweet Quote

09-03-2018, 03:22 PM	#2
nsjames Brigadier General 2440 Rep 4,331 Posts Drives: 08 328xi Touring Join Date: May 2017 Location: ohio iTrader: (0)	you should post in the general forum. this is just for specific xdrive related issues. but it sounds like something is taking down the can-bus and the entire car is freaking out over it. you need some sort of diagnostic capability. kcan+ista is the cheapest/best route.
	Appreciate 0 Quote

09-13-2018, 03:18 PM	#3
B0z0 Registered 0 Rep 3 Posts Drives: 2009 328xi E92 Join Date: Apr 2018 Location: Detroit iTrader: (0)	I have an 09 e92 sulev that would stall in similar situations. My iDrive told me the same thing. The factory fuel pump control modules overheat so I was losing fuel pressure. It might be worth looking into, although my fix was to remove the seat bolster and leave it open so it can cool off easier. I never had a problem after that, but it was def ghetto. Hopefully this helps!
	Appreciate 0 Quote

10-18-2018, 07:20 AM	#4
paulv824 Registered 0 Rep 4 Posts Drives: 2007 328xi 6spd Join Date: Oct 2018 Location: nj iTrader: (0)	Just for good measure i would check the motor ground straps. ive had a similar issue.
	Appreciate 0 Quote