I have 4 codes that keep popping up. I replaced the 2 precat sensors and drivers side post cat but I still keep getting these codes: p0031, p0051, p0158, p0136. 136 will come back as soon as I start the truck and the others come back while driving. Do I have a bad PCM or what? I have a 2002 dodge Dakota 4wd with 360 motor.


Just unhooked battery while I looked for anything broken and All the codes came back as soon as I restarted this time.

 

i have done mine yet , but you didn't mix up the plugs, did you?