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X5 E70 (2007 - 2013)
E70 BMW X5 produced between 2007 and 2013. Discuss the E70 X5 with other BMW owners here.

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  #1  
Old Yesterday, 11:56 AM
gmc8757 gmc8757 is online now
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P2621 Throttle position , output signal - circuit low

Hey Guys,
I have a check engine light I'm hoping you can help me with. I have a generic code reader and it gave me this code - P2621 Throttle position , output signal - circuit low. I can reset it, it's fine for a few minutes, once I shut the car off and start it back up, the light comes back.

This may be a coincidence but worth mentioning. The first time I saw it was when I stopped to get diesel at a truck stop, the pump nozzle was too big, so I drove around to a regular diesel pump (I think I put the cap back on but may not have) and filled up. After filling up and driving off for good, I saw the light.

I was about 400 miles from home when it first happened, I drove home without an issue except for the light.

What do you think? Could it have been something with the cap not being on right? But why wouldn't the light stay off once I erase the code? Maybe because it's just a generic code reader? Or maybe it was a coincidence and I have something wrong with the throttle position?
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  #2  
Old Today, 03:07 AM
jashearer jashearer is offline
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I lost a throttle position sensor on my '00 silverado, it was a cheap part and easy to replace. I'd start there if your are somewhat handy with a wrench.

I doubt the fuel cap had anything to do with it.

Jay


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  #3  
Old Today, 06:04 AM
gmc8757 gmc8757 is online now
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Thanks Jay. Any idea where I could buy one? Anyone know of a write up on how to replace it?
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  #4  
Old Today, 06:41 AM
ninja_zx11 ninja_zx11 is online now
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Quote:
Originally Posted by gmc8757 View Post
Hey Guys,
I have a generic code reader and it gave me this code - P2621 Throttle position , output signal - circuit low.
Try to use proper BMW diagnostic software like INPA,DIS or rheingold. Sometimes these generic code readers don't give you BMW specific code and also BMW software has test plans which will guide you through the steps specific to the code.In that way it gets easy to diagnose.
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  #5  
Old Today, 08:13 AM
gmc8757 gmc8757 is online now
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I think you may be on to something. I'm going to look into getting the usb reader along with the software. Thanks
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  #6  
Old Today, 12:22 PM
lpcapital lpcapital is offline
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Please keep us posted!!!!

Provided that the description of the code may be inaccurate, one thing though: the throttle plate on the Diesel engine is used in connection with the EGR system. One thing I may suggest is to call you local BMW dealer to verify that all open campaign (i.e. recalls) have been addressed on your car. They will ask for the last 7 digits of you VIN so they can verify. Many of them have to do with the EGR system

If not schedule an appointment and bring it in: either your code is related to some campaign or you may get a free diagnosis... Lots of time those diagnoses from the dealer are not really all that great, but it may give us clue of what your problem could be.

An alternative is to remove the charge pipe on the intake side (you pull the clip that holds it) and check if the throttle plate can move freely: it may be gummed up from the EGR
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Last edited by lpcapital; Today at 12:28 PM.
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