I have a jeep grand cherokee with 213,000 miles that was running great up until yesterday. All of a sudden it started running really crappy. I am getting a bunch of error codes

P1388 P0320 P0353 P1389 P0300 P0301 P0301 P0302 P0303 P0304 P1756 P1391 P1762 P1494

any advice on where to start on this would be helpful. The jeep starts and runs but now the engine shakes and the ride isnt as smooth. starts off slow at lights and the check engine light is blinking

 

Did you just recently gas up?

 

I gassed up almost every other day

 

Might have gotten a load of bad gas if it came without any other warning...thats an awful lot of codes

 

Anytime I see that many codes pop up at one time I have to really start thinking that there is a ground wire problem. I am willing to bet if you check the manual all those sensors are sharing the same ground.

 

ive changed a bunch of grounds a few months ago. I will check them out! I changed my ASD relays and

I unplugged my battery to erase the codes to see if there was any changes in the codes. so far none havent popped up but its still running really crappy. misfiring, shaking