The codes are for my o2 sensor/heater circit and a faulty fuel supply. The codes go away when i shut the car off and come on randomly while cruising. Sometimes its only the fualty fuel supply code. They are happening more and more frequently. Im missig one of those little brown spacers that go between the fuel rail and te IM. Could the vibration cause the codes? Any other ideas, ive double checked everything i touched concerning the fuel system and its all fine. Could my o2 sensor be going bad? Thanks for any help.

 

try to change the plugs, and check the gap, then reset the ECU and see what happens, you may have a foul plugs and running a lil rich or leaner than normal..

if it still happening again, try to swap O2 sensor to see if it helps any

stan