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E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 08-21-2014, 08:23 PM
Gumball335 Gumball335 is offline
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Location: San Diego, CA
 
Join Date: May 2014
Posts: 4
Mein Auto: 08' 335I
crankshaft poistion sensor issue?

So.....I let my girlfriend borrow my car for a week so I didn't have to drive 40+ miles to work and back before driving to Vegas tomorrow which I'm thinking was a mistake or it could just be a freak issue. got in my car this evening to head to the gym and the car started up like an old 1982 Chrysler LeBaron. It cranked over about 3 times as much as it should(normally stats right up) and then once it finally started it threw some codes at me. P2a94 was the first one it threw and then the code for limp mode. It also told me on the display there is a transmission malfunction as well. when I put it in reverse the tranny slams hard and the car is running very hot and condensating real bad from the exhaust. If I try to clear the codes while the car is running it stalls out. I'm going to limp it into the dealership first thing tomorrow morning but any ideas or help is much appreciated.
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Cobb tuned 335 with a swanky catback
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Old 08-21-2014, 08:26 PM
sptt144 sptt144 is offline
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Location: Orange County, Ca.
 
Join Date: Aug 2012
Posts: 1,082
Mein Auto: 2009 335i
And he did not indicate any other problems prior to you firing it up today? Just..."Surprise!"?

Last edited by sptt144; 08-21-2014 at 08:27 PM.
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Old 08-21-2014, 08:30 PM
Gumball335 Gumball335 is offline
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Location: San Diego, CA
 
Join Date: May 2014
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Mein Auto: 08' 335I
My girlfriend swears up and down that it had no issues the whole time she had it. The last time she drove it was about two hours prior to me coming outside, trying to start my car, and then proceeding to freak out on her. So yeah, total surprise.
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Old 08-21-2014, 08:36 PM
sptt144 sptt144 is offline
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Location: Orange County, Ca.
 
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Mein Auto: 2009 335i
Can you deactivate a cobb tune? I have a JB4 so don't know Cobb. CPS usually cause stalling and not starting issues. Typical problems with 335i are VANOS solenoids (how often do you change oil?), fuel injectors, and ignition coils (much cheaper to fix than injectors).

Last edited by sptt144; 08-21-2014 at 08:52 PM.
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Old 08-21-2014, 08:44 PM
sptt144 sptt144 is offline
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Location: Orange County, Ca.
 
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Mein Auto: 2009 335i
it is possible that it is just a CPS. What year is the car?
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Old 08-21-2014, 08:53 PM
Gumball335 Gumball335 is offline
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Location: San Diego, CA
 
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Mein Auto: 08' 335I
08' 335I. I can deactivate the tune if need be, but I don't think that's the issue. I change the oil about once a year....
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Cobb tuned 335 with a swanky catback

Last edited by Gumball335; 08-21-2014 at 08:57 PM.
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Old 08-21-2014, 08:59 PM
sptt144 sptt144 is offline
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Location: Orange County, Ca.
 
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Mein Auto: 2009 335i
My Bentley manual says sticking VANOS solenoids can cause a CAMSHAFT SENSOR FAULT codes to be stored (similar sensor to a Crankshaft Position Sensor). These are hydraulic solenoids that are pressurized with oil to affect the timing in the engine.

It says that a Crankshaft postion sensor will cause no start issues which I have had before.

There are two Camshaft POS Sensors located at the front of the engine on each side of the VANOS Solenoids. Odds are its one of those causing your issue. Cheap to do yourself but who knows with dealer unless you are under warranty.
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Old 08-22-2014, 12:48 PM
ewolr ewolr is offline
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Location: Austin, Texas
 
Join Date: Jul 2007
Posts: 67
Mein Auto: Toyota Tacoma
Been there done that. Start with the Camshaft position sensors. If you are getting a code write it down, pull the sensors out and clean them up really good and swap the positions of the sensors. If the car throws another code, see if it's changed to from one side or the other. See this article for more details: http://www.pelicanparts.com/BMW/tech...or_Testing.htm

If that does not fix it, your in for a Crankshaft position sensor replacement. There are DIY guides that say you can get to it from under the car, but I have to say I could not find a way to do that. I had to pull the intake to get to it. It's not for the faint of heart. I have done it twice. Once to swap the starter and the other for this sensor.
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