问:我有一个2007年道奇充电器3.5 l v6发动机NAG1 RWD传播。我困惑我的车是什么导致跛行模式. .当c

我有一个2007年道奇充电器3.5 l v6发动机NAG1 RWD传播……我困惑我的车是什么导致跛行模式. .当codes are cleared initially I can drive a day or two then the first and only code I'm getting is p0420 bank 1 cat efficiency below threshold..It doesnt go in limp mode still and I can drive another day or two..Eventually it goes in limp mode and then I receive the codes p2767 and p2784..input speed sensor codes..The transmission shop recommends changing the conductor plate..I've already replaced the catalytic converter on my driver side and bank 1 o2sensors but I'm still getting the po420 code for bank1.I'm trying to find out if the po420 code could be causing limp mode or if it's just the p2767/p2784 codes.The trans shop is saying the p0420 code has nothing to do with the limp mode, the limp mode prob can only be diagnosed after it goes in limp mode and that's y I'm only getting the sensor codes after and not before.Don't wanna get a new plate and still limp

我的车有119505英里。
我的车有一个自动变速器。