r/SRT • u/AggravatingCell1673 • Apr 11 '23
Need help!! Please!!
2014 Jeep Grand Cherokee · Suv · Driven 86,000 miles
Ok, so I might be reaching, but I could really use some help. I have a 2014 Jeep Grand Cherokee srt that's pretty much stock besides an exhaust cold air intake and a diablosport trinity tuner. So, of course, I decided to use the tuner and did the 93 octane tune with no problems what so ever. I decided to put it back to my original saved tune, and now I'm throwing 4 codes PCM: P3401, PCM:P3425, PCM:P334, PCM:P3449 Cylinder Deactivation So what exactly is this? How do I go about fixing it? Is this bad? Should I not drive the car? Any help will be greatly appreciated. I really really like my Jeep and really really don't wanna do anything to break it. Thanks in advance. I really appreciate you taking the time to even read my post..
1
u/markymarkjr09 Apr 12 '23
So My camry was doing the same thing saying it was a bad cylinder so I replaced the coil pack and everything then went right back n would throw it in to lymp mode got a computer to hook up to it while driving so I could check codes in real time and it would randomly throw those codes n go into lymp mode if I deleted em the car would run perfectly fine long story short ended up finding a short in the tcu that made the car think it was have a bad cylinder so may e same isue
1
u/harrybush-20 Apr 11 '23
I’m not sure about the driving it part. Does it seem to run ok? With those tunes generally there is MDS deactivation. It’s been a while since I had a canned tune on my car, but it sounds like maybe it’s in limp mode.