JB4 Error Codes and Limp Mode W205 C43
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Joined: Dec 2022
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W205 C43
JB4 Error Codes and Limp Mode W205 C43
Good Morning Everyone, hope you all had an amazing Christmas
I purchased a JB4 Bluetooth kit for my 2016 W205 C43 a few months back and had it installed.
The problem I seem to be having is, regardless of what map I try to use (1-3), if I give her a bit of a tickle on the freeway....my engine light comes on, it goes into limp mode and I get the following 2 codes come up on the JB4 App.
P0087
PC431.
Is anyone able to give me some guidance as to what issues im having here and possibly point me in the right direction to get it working properly.
Thank you in advance
Last edited by Smoothy75; Dec 26, 2022 at 07:59 PM.
Senior Member
Joined: Mar 2018
Posts: 323
Likes: 103
From: Central Florida
'15 C400 and '15 ML350
I recently had a P0087 code as well.
Its from low rail pressure from either low fuel, too much E85, having FOL setting too high, or too much boost in cold weather.
Its from low rail pressure from either low fuel, too much E85, having FOL setting too high, or too much boost in cold weather.
