2008 535xi idle, starting issue

[EEscobar535xi]

Good afternoon, had my 08' 535xi for almost 2 years never had and issue with it. It all started while driving on freeway car went into what I assume was limp mode, car was in yet no power in acceleration, immediately got the AWD- DSC warnings on. Got off the freeway stopped at gas station turned car off and couldn't get it back on. It would turn over but not start. Took it to the shop have had crank shaft sensor replaced changed negative cable on battery thinking it could be an electrical problem. After a while got it to start but it would idle like crazy. Computer gave me two codes 2CFE and 2D09 related to throttle body, got that replaced abs still keeps on idling. Takes me while to start it yet after it does it just idles even on drive or reverse gears. Now it's giving me 2DEB,3100, 2ACB codes as well. Anyone has had this issue and has resolved it ?

[e91Owner]

Originally Posted by EEscobar535xi

Good afternoon, had my 08' 535xi for almost 2 years never had and issue with it. It all started while driving on freeway car went into what I assume was limp mode, car was in yet no power in acceleration, immediately got the AWD- DSC warnings on. Got off the freeway stopped at gas station turned car off and couldn't get it back on. It would turn over but not start. Took it to the shop have had crank shaft sensor replaced changed negative cable on battery thinking it could be an electrical problem. After a while got it to start but it would idle like crazy. Computer gave me two codes 2CFE and 2D09 related to throttle body, got that replaced abs still keeps on idling. Takes me while to start it yet after it does it just idles even on drive or reverse gears. Now it's giving me 2DEB,3100, 2ACB codes as well. Anyone has had this issue and has resolved it ?

Check the voltage output of the alternator. Those faults are common problems with a bad voltage regulator, potentially causing blown fuses to/from the DME relay.

If the voltages are fine, then I would check the fuses both in the car and the e-box.

[e91Owner]

Do you have ISTA?

[EEscobar535xi]

No I dont

[e91Owner]

Originally Posted by EEscobar535xi

No I dont

I recommend downloading it and it will guide you through the fault isolation process to include the wires to shoot.

The only thing you have to purchase is a cable. Just search the forums. There are tons of ways to download it.

However, if I understand your original post, those first two codes are still present, correct? Have you tried clearing the codes to see if the last three go away? They sound like transitory faults after a power removal.

If the first two codes relating to the throttle valve are still present, I recommend checking the connections between the throttle valve and the DME for continuity. This is a common problem with N5x engines that the connection goes bad.

[EEscobar535xi]

These are some of the codes that I got.

[e91Owner]

Originally Posted by EEscobar535xi

These are some of the codes that I got.

Can you send a closer picture of the codes? I can't make them out in the photos.

[EEscobar535xi]

Let's se if you can see them now

[EEscobar535xi]

I have another question is there any chance because of the front level sensor to have break caused the 4x4 awd and DSC warning lights to come on?

[e91Owner]

Originally Posted by EEscobar535xi

I have another question is there any chance because of the front level sensor to have break caused the 4x4 awd and DSC warning lights to come on?

No, that is used by the car to adjust the level of your headlights.

[e91Owner]

Originally Posted by EEscobar535xi

Let's se if you can see them now

See where it says fault not present? That means it will go away when you clear it. You only have 3100 expanded in ISTA, but I would clear the codes and see what is still there.

[EEscobar535xi]

Originally Posted by e91Owner

No, that is used by the car to adjust the level of your headlights.

What can cause the 4x4 awd and DSC to turn on it.

[e91Owner]

Originally Posted by EEscobar535xi

What can cause the 4x4 awd and DSC to turn on it.

The most basic solution is to turn the wheel all the way to the left and then back around all the way to the right.

On x-drive cars, you have to do this every time you disconnect the battery.

[EEscobar535xi]

Originally Posted by e91Owner

The most basic solution is to turn the wheel all the way to the left and then back around all the way to the right.

On x-drive cars, you have to do this every time you disconnect the battery.

I read something about this but the warning lights happened as I was driving in the freeway, and I pulled to the right hard from a car that decided to switch lanes and get I front of me. I don't understand why they turned on.

[e91Owner]

What typically causes that fault is having to recalibrate the steering angle sensor. That happens every time you disconnect the battery. If that doesn't clear it, you can also calibrate it through ISTA.

[EEscobar535xi]

Originally Posted by e91Owner

What typically causes that fault is having to recalibrate the steering angle sensor. That happens every time you disconnect the battery. If that doesn't clear it, you can also calibrate it through ISTA.

Ok I'll look into it thank you

[e91Owner]

You can find YouTube videos of how to calibrate it with ISTA.