So I recently bought the truck and posted about the misfire problems, turns out the guy before me put platinums in it, got rid of the misfires with copper plugs.

I'm still throwing p0155 code (o2 bank 2sensor 1) even though I've replaced both upstream sensors with mopar sensors.

One mechanic told me I need a pcm without even looking at it and another said it has to be either a short or an exhaust leak. My manifold on the right side does have a leak so I'm trying to figure out if I should be purchasing a new manifold or pcm?

Any help is much appreciated

 

eather way you need a new manifold. do that first and then see what happens after you clear the codes. I doint think the computer is at fault.

 

Bolts were cracked in the manifold, i just had them taken out and new ones put in, it no longer leaks.

The new upstream sensors are both mopar from the dealer.

Drove the truck about 18 miles with no code after fixing the manifold. Stopped at a light and floored it just to hear it without the leak and got a CEL for Low Barometric pressure P0129 and the O2 code again P0155, immediately reset them. 8 Miles later I got the O2 code again P0155.

PLEASE HELP?!

 

p0155 is the heater circuit. The o2 may still work. Possable bad o2 from the dealer, Your call the only way to fix the heater circuit is to replace the o2 sensor.

 

I've replaced the sensor, and I've tried switching the sides of the new sensors and it still only throwing the one code so it can't be a broken sensor

 

Check the wiring coming from the truck to the sensor.

 

If you have ruled out the O2 sensor then its your wiring or your PCM.