p0306,p0206,04 chysler pacifica
 

Okay new to the whole pacfica cars, First I brought this car supposely just need new injector harness. Well after narrowing it down and mechanic said it had to be the PCM so, install the pcm today drove like a champion for like 5 mins then startled missing again and thowing thr codes above. we have been working out butt off trying to fix this car any help would be great