Limp mode? Bad terminals? Bad ground?

[jakecxvii]

Hey everyone not sure if I'm posting in the right spot or not but I've been dealing with a very strange problem with my 2015 Hyundai Genesis Sedan. I'm getting close to 14 codes on my car but most consistent is U0101,U0109,U0001
Which are
Lost communication to TCM
Lost communication to FPCM
& Can Bus off.
I went through the visible wiring from the fuel pump control module (in the trunk) and the TCM module (under the hood) I'm starting to lose hope due to financial reasons I can't afford to take it to a professional and the car is basically un-drivable
It can be driving perfect for close to a mile then it drops to lower gear and revs close to 4500-5000rpm before shifting on its own, (A very hard shift) but once I pull over and kill the car and restart it then it starts driving good for a another mile or so. Everything I've been reading is saying it's sort of a simple problem usually wiring issues or a bad ground somewhere but I can't find a wiring diagram to track down the problem anyone have a similar issue?

 

[Sal Collaziano]

Hey everyone not sure if I'm posting in the right spot or not but I've been dealing with a very strange problem with my 2015 Hyundai Genesis Sedan. I'm getting close to 14 codes on my car but most consistent is U0101,U0109,U0001
Which are
Lost communication to TCM
Lost communication to FPCM
& Can Bus off.
I went through the visible wiring from the fuel pump control module (in the trunk) and the TCM module (under the hood) I'm starting to lose hope due to financial reasons I can't afford to take it to a professional and the car is basically un-drivable
It can be driving perfect for close to a mile then it drops to lower gear and revs close to 4500-5000rpm before shifting on its own, (A very hard shift) but once I pull over and kill the car and restart it then it starts driving good for a another mile or so. Everything I've been reading is saying it's sort of a simple problem usually wiring issues or a bad ground somewhere but I can't find a wiring diagram to track down the problem anyone have a similar issue?

Welcome. We have a section specifically for your second generation Genesis Sedan. This topic has been moved there...

 

[Keenezo37]

Welcome. We have a section specifically for your second generation Genesis Sedan. This topic has been moved there...

Sal, where is the section? I’m having a similar issue

 

[srobak]

Sal, where is the section? I’m having a similar issue

Heya,

This thread in particular is located in that section (Sal had moved it). You can get to the section by navigating from the top level, then to "Hyundai Genesis Sedan Forums", then to "General 2015-2016 Hyundai Genesis Sedan Discussion".

 

[Keenezo37]

Heya,

This thread in particular is located in that section (Sal had moved it). You can get to the section by navigating from the top level, then to "Hyundai Genesis Sedan Forums", then to "General 2015-2016 Hyundai Genesis Sedan Discussion".

View attachment 58894

sorry to be a bother, can you be more specific? There is 287 pages of with about 10-15 different discussions per page. I am trying to find more on this specific topic.

Appreciated

 

[2GenTony]

Did anyone ever answer this? My 2016 is doing the same thing.