335d cutting out under load , no fault codes ?

Rob-330d · 03-28-2016, 02:11 PM

Hi guys it started doing this today , under load the car completely dies I let it come to a stand still select park the remove and re insert the key then it starts fine until I boot it again . No codes are stored I had a quick Google and came across a couple of threads the same that turned out to be a faulty crank sensor ? What are your thoughts ? Any help is much appriciated .

Cheers
Rob

GXCars · 03-28-2016, 02:56 PM

Crank sensors don't always give codes and will cause the engine to die, they are usually worse once the engine warms up for some reason as well

Removing the key resets everything so sometimes if you try cranking after its cut out before removing the key you may be able to get it to throw a code but also check the battery connector in the boot it can also cause it and it's a know issue

Rob-330d · 03-28-2016, 03:03 PM

Thanks for the reply I'll definitely give the battery a look in the morning as I've never heard of that problem before . I'll code read it again tomorrow as well .

Rob-330d · 03-28-2016, 03:26 PM

Just checked the battery and everything seems ok and tight .

Aragorn30d · 03-29-2016, 12:29 PM

Ecu's often a bit silly with the crank sensor. If the signal vanishes it will simply assume the engine has stopped. And if its stopped, it clearly shuts off the fuel etc. It doesnt consider it a fault, because its a normal possibility, you might have stalled it for instance.

The real question is why the signal only vanishes with you use full power... Maybe the engine moving around and pulling on the wires?

03-28-2016, 02:11 PM	#1
Rob-330d Enlisted Member 2 Rep 41 Posts Drives: E91 330d touring sport manual Join Date: Sep 2014 Location: Norfolk iTrader: (0)	335d cutting out under load , no fault codes ? Hi guys it started doing this today , under load the car completely dies I let it come to a stand still select park the remove and re insert the key then it starts fine until I boot it again . No codes are stored I had a quick Google and came across a couple of threads the same that turned out to be a faulty crank sensor ? What are your thoughts ? Any help is much appriciated . Cheers Rob
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03-28-2016, 02:56 PM	#2
GXCars Enlisted Member 10 Rep 47 Posts Drives: 2007 E92 M Sport Coupe Join Date: Dec 2015 Location: Buckinghamshire UK iTrader: (0)	Crank sensors don't always give codes and will cause the engine to die, they are usually worse once the engine warms up for some reason as well Removing the key resets everything so sometimes if you try cranking after its cut out before removing the key you may be able to get it to throw a code but also check the battery connector in the boot it can also cause it and it's a know issue
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03-28-2016, 03:03 PM	#3
Rob-330d Enlisted Member 2 Rep 41 Posts Drives: E91 330d touring sport manual Join Date: Sep 2014 Location: Norfolk iTrader: (0)	Thanks for the reply I'll definitely give the battery a look in the morning as I've never heard of that problem before . I'll code read it again tomorrow as well .
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03-28-2016, 03:26 PM	#4
Rob-330d Enlisted Member 2 Rep 41 Posts Drives: E91 330d touring sport manual Join Date: Sep 2014 Location: Norfolk iTrader: (0)	Just checked the battery and everything seems ok and tight .
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03-29-2016, 12:29 PM	#5
Aragorn30d Lieutenant Colonel 175 Rep 1,596 Posts Drives: E90 330d Join Date: Mar 2015 Location: Fife iTrader: (0)	Ecu's often a bit silly with the crank sensor. If the signal vanishes it will simply assume the engine has stopped. And if its stopped, it clearly shuts off the fuel etc. It doesnt consider it a fault, because its a normal possibility, you might have stalled it for instance. The real question is why the signal only vanishes with you use full power... Maybe the engine moving around and pulling on the wires?
	Appreciate 0 Quote