rick circeo

Installed the Sprintbooster in my '06 550 the other day. Initially I installed it incorrectly (put the pins in wrong) and the car had a rough start, immediately stalled and wouldn't restart (just cranked). I figured out the problem with the install and, after correcting it, everything runs great but every time I start it I get the "Engine Malfunction. Reduced Power" lite, which stays on the entire time the car is running. There is no reduced power or any noticeable difference in the way the car operates, other than the fact that the Sprintbooster certainly changes pedal response.

So far I have:

Driven over 100 miles.
Uninstalled and reinstalled the Sprintbooster.
Uninstalled the Sprintbooster, reconnected the original wiring, and then reinstalled the Sprintbooster.
Taken it by 2 Auto Zones to have the code cleared, but both times the code did not register on their equipment so they said they couldn't clear it.
Done the 25 second tranny reset.

I assume this is just a computer issue, but if anyone has thoughts otherwise let me know. If it is a computer issue, how do I clear it without going to the dealer?

EuroCarFan

I vaguely recalled someone having a similar issue like yours and they had brought it to the dealer to have the fault code cleared and it worked. Seems like you tried that with Auto Zone so not sure what the difference is. Bumping this thread up so hopefully someone else can chime in to help you.

rick circeo

Thanks for the reply. I am trying to avoid the dealer because the car is still under warranty for another year and I don't want to catch any crap from them about the 'Booster. The guy from Auto Zone said that some faults (like this one apparently) have to be cleared by the dealer (or maybe a mechanic, but not Auto Zone). Worst case scenario I can uninstall the 'Booster and run by the dealer and have the fault cleared, just looking for a simpler solution.

EuroCarFan

I understand wanting to avoid the dealer but I would just take out the SB and go to the dealer and just say the fault code came up out of nowhere. They will never know the SB was installed.

rick circeo

Yep, that's the option I'm going with.

John@Motorcepts

+1. Take the SB out and any other mods u have related to the engine out. they have to their own BMW code thing to cancel it and not some OBD2 sensor.