CEL popped up yesteday!!!!
 

I was driving to the gym yesterday (5/9/16) and the check engine light popped up. While driving I wasn't pushing the car hard just normal commuting as I do everyday. I swung by AutoZone to get it checked out and it threw the following codes: P1017, P0440, and U0100. After some research i discovered they mean this:

P1017: performance issues with eccentric shaft sensor

P0440: EVAP system issue

U0100: signals between the electronic control module or powertrain control module and another module have been lost. Could be issue with CAN bus wiring

Now it is worth noting that the car was sitting for about a month outside while I was away on vacation in mixed hot/cold weather in NJ. Is it possible that these codes could be getting thrown because of that and they will eventually settle? I have driven the car about 300 miles since initial sitting and the light probably came on around mile 280 so I haven't done much driving with the CEL on. While driving it and the light was on I did not notice any performance issues with the car at all. I know the code U0100 is the more serious of the three and that is the one I am most concerned with. Has anyone had a similar issue with this or do you think the three codes could be correlated with each other? Any help is greatly appreciated I am not trying to shell out some cash just to have a dealer diagnose it.

I've experienced eccentric sensor failure on my E83, with the same N52 engine. It was pretty scary: sudden lost of power on highway. As the sensor deteriorates, the chance of losing power is getting more frequent, providing it is the sensor problem. It's not a hard job. Taking the cover off can be tricky, but as long as it's off, sensor is right there with 3 bolts. Change VCG while you're there.

Good luck!


Sent from my iPhone using Tapatalk

1. Age, model and mileage?

2. A long sit can kill the battery on these cars. Odd things happen with low voltage, modules get confused, etc. That U-code seems suspicious.

3. ABSOLUTE first thing to do is this: Reset the codes, see which come back.

You have no idea which of those three codes is currently setting the CEL.

Before getting quotes on shaft sensor replacements or anything- reset codes, see what returns. Buy a code reader too. Something BMW specific, not autozone

Wait, forgot...#4.. are you sure it was TO the gym and not on the way home?!?!?!

No.4 question is epic!!!


Sent from my iPhone using Tapatalk

don't forget to set the battery on a charger overnight once you clear the codes. Low batteries in these cars will often signal all kinds of unrelated CE lights.

Sorry I dont know why i did not put the specs of the car on there lol that shoudl have been the first thing! But here are the answers

2008 BMW X5 3.0 just over 119k miles on it

That is what I was thinking. I will reset the codes and charge up that battery and see what happens hopefully that does the trick. And number 4 was definitely on the way! Haha