When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Sometimes when i hammer down on my Eurocharged tuned 2013 E550 it will go in limp mode and say INOP error on dash. When error was on and in limp mode, i scanned it and got pic below. I seen a lot of guys put new pedal sensors. But noone actually says if that fixes the issue. Should i pop one in? Or could it be something else wrong? Thanks.
I believe there is a reset procedure for the pedal, Turn car key to position 1 push pedal to floor, hold down , then turn car off and release. Please look up this procedure here on the forum as it's been five years since I did mine and fixed it. others have had to replace their pedal assembly. Clear current code first. I apologize for the half- **sed advice.
I believe there is a reset procedure for the pedal, Turn car key to position 1 push pedal to floor, hold down , then turn car off and release. Please look up this procedure here on the forum as it's been five years since I did mine and fixed it. others have had to replace their pedal assembly. Clear current code first. I apologize for the half- **sed advice.
these steps look similar to a tranny reset procedure.
I had that fault at 10kMi on E350-'14 and dealer replaced a defective pedal sensor. Other people invoke broken pins in harness connector...
🙂
After i reset with the scan tool or do the manual reset, the car works well for about 6 or 7 WOT rips. Then zonks out and goes to limp mode again. Installing a new pedal tomorrow and then will post info. When it does work, it feels pretty good! Hoping a Eurocharged TCU tune to join my ECU tune will get 0-60 in the 3's and 1/4 into 11's.
I had the same problem with my '07 SL550. Romp on it and it went into limp mode. Turn the car off, then restart and the car would reset. Until next time. According to my old notes, I would get a throttle position sensor error, code P2123.
Just to close up this issue and be more of a help for future searchers, a new gas pedal totally did fix the car! No more limp mode or inop lights under any driving circumstances. Thanks again everyone.
Thank you for sharing that! So we know for sure the exact fix is the pedal sensor.
Those who have not yet had that taken care of should fix it as a maintenance item.
The simple fix is to take 5mn to resolder a couple loose connector pins inside the pedal module ... unless your sensor is worn through then new one would be best to prevent any limp mode - Easy peasy
----- EDIT 1----
That's another good reason to go scout around the driver footwell... regardless my pedal being shot & replaced at 5kMi.
----- EDIT 2-----
Gas pedal module is sealed such that opening it would have no reverse step. 🤣
Last edited by CaliBenzDriver; 06-24-2021 at 11:09 PM.
Thank you for sharing that! So we know for sure the exact fix is the pedal sensor.
Those who have not yet had that taken care of should fix it as a maintenance item.
The simple fix is to take 5mn to resolder a couple loose connector pins inside the pedal module ... unless your sensor is worn through then new one would be best to prevent any limp mode - Easy peasy
----- EDITS----
That's another good reason to go scout around the driver footwell... regardless my pedal being shot & replaced at 5kMi.
If you know how to repair the pedal, please share. After replacing my pedal, I tried to tear down the defective pedal and see if it could be fixed. Based upon my experience and what I had read on the R230 discussions here, I concluded that the pedal was unrepairable. And I was able to find a used pedal for only $50.
If you know how to repair the pedal, please share. After replacing my pedal, I tried to tear down the defective pedal and see if it could be fixed.
Based upon my experience and what I had read on the R230 discussions here, I concluded that the pedal was unrepairable. And I was able to find a used pedal for only $50.
I had a look at my own APP (pedal sensor)... you are right, the new one is sealed shut with no easy way in !!
The problem is said to be caused by the connector solderless pins. I don't know how my failed sensor looked before dealer replaced it under warranty.
I have since discovered the TSB meaning of "loose connector pins"... You need circuit board to access all the unsoldered male pins. The female side has no issue.
I am resolved to fix every module with unsoldered pins on my E350'14 !
🙂
Last edited by CaliBenzDriver; 10-09-2021 at 02:33 PM.
On the R230 discussion board, it was reported that the issue is in the potentiometer inside the pedal. It gets a little worn, and can't keep track of position during a fast pedal movement. Thus an error occurs when there is a lapse in pedal position reported to the ECM, resulting in the limp mode.
On the R230 discussion board, it was reported that the issue is in the potentiometer inside the pedal. It gets a little worn, and can't keep track of position during a fast pedal movement. Thus an error occurs when there is a lapse in pedal position reported to the ECM, resulting in the limp mode.
No potentiometer. It's a contact-less hall sensor. so nothing to clean
04-23-2021, 02:41 PM
