pappasurf

Hi guys !
I accidentaly fixed a problem with my car when "ESP inoperative" and "Run flat indicator disabled" messages appear on dash screen.
As I figured it shows only when I kickdown the gas pedal while steering wheel is slightly turned (almost every overtaking situation).
All I did was remove the SprintBooster since I was selling it.
This may not make any sense to you but my car has no more problems regarding ESP. It may not work for you but it´s not a hard thing to try out...and it definitely fixed mine. Good luck !

forevr5688

This just happened to me as well. I was getting ESP Inoperative messages at high speed (80mph and up) from time to time. Car would go into limp mode and I would have to stick it in neutral to restart it to avoid having to pull over. Anyway, last week I started the car and as soon as I pressed the gas pedal, the car would go in into limp mode "ESP Inoperative" and threw a code. Could not drive it anywhere. Luckily, I had a code reader to check the code. It came back as P2122 which stood for Check potentiometer of component B37 (Accelerator pedal sensor). Hall sensor 1 : Short circuit to ground or open circuit. This led me to think the sprint booster may be causing the problem. I pulled it out and noticed the housing was cracked and the metal pins had dislodged. Now that it is out, I have no ESP Inoperative problems anymore. To think, I have been having ESP Inoperative issues for years and never suspected the Sprint Booster. I do miss the responsiveness it provided when you press the gas pedal but I prefer the car not going into limp mode in the middle of the highway. I also noticed the car runs smoother now as well. Hopefully, this helps some of you guys out there who have been experiencing the same issues.

PeterUbers

Good info... Just installed sprint booster and now thinking of getting rid of it based on this info

B Heals

I know it more pricey, but could you tune the ecu as an alternative?

DapperStyle

I've been using a SB for over 6 months with no issues at all.

beneliezer

when i had this issue diagnosed at the dealer, they ended up replacing the gas pedal. no SB but i am OE tuned C300

the_indian_kid

i remember before getting my sprint booster for the 2008 c350, i had the same issue years back, and was replaced under warranty (sensors or some sh*t).