• The site migration is complete! Hopefully everything transferred properly from the multiple decades old software we were using before. If you notice any issues please let me know, thanks! Also, I'm still working on things like chatbox, etc so hopefully those will be working in the next week or two.

Need help!!

Peirce1970

New member
I have a very bad mis at idle runs smooth while driving and seens to have plenty of power. Stopped by advance today so I could have it scanned. The code I got were P0135 Oxygen sensor bank 1 sensor 1, P0300 Random, multiple musfire, and P0420 Catalyst system efficiency below threshold bank 1. Anybody know what this could be? One O2 sensor? Both O2 sensors?
 


I means either...

A) Your cat is clogged...

B) Your front o2 Sensor is toast

C) Your cat is developing a misfire...most likely from the clogged cat...along with it most likely trashing your front o2 from all the heat it built up.

Sorry people have lives other than GPF...we don't live here. You can always research on your own you know...there is a search button here and there is another AWESOME PLACE YOU MIGHT NOT HEARD OF...

called...

www.google.com

/endrant.
 
I do appreciate the help! I I did reserch before I posted and did'nt really find anybody with the same combination of trouble codes and the same exact same symtons as me.
 
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