Having issues with these codes, checked for leaks, new gas cap (OEM) new Dorman purge valve. It starts up fine then about 15 seconds later it starts idling rough for about 30 seconds then it's fine. But then i start down the road and get about a mile or 2 then it starts spitting and backfires, i usually just floor it if possible and it clears out. I also replaced the TPS a few years ago, any suggestions on what this might be ?.......Thanks

 

P0455: Evap system, large leak. This is probably a rotted out hose somewhere.

P0132: O2 sensor issue..... voltage is staying high, and not switching. This leads the PCM to think the engine is running rich (lean?) so it doesn't give it enough fuel (or maybe too much....) to run properly. Unplug the front O2 sensor, go for a drive. (yep, that'll set a code too.) If it runs better, replace the sensor.

 

Yea,as mentioned test it ,an if it shows up as bad , use the mopar 02 sensor.
I've had that purge code before an the hose off the purge valve can have a leak or crack but look at the 02 1st.

 

NTK is the mopar sensor - Can get them from the box stores but they are sometimes special order.