• 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.

po420 code? confused still though??

Bluemagic

Bluemagic

New member
OK i have been throwing a 420 code for quite awhile and now i am just getting a chance to look at it properly. if i remember correctly the car has had a u bend delete done to it so what does that mean? do i change the sensor? how hard is it to replace? which sensor is it? just wanted some info guys thanks!
 


That could mean a few things.. Either the O2 sensor is bad (not reading) or your cat is dead. If your not feeling any power loss its probably not melted just not cleaning the air properly no clue how many miles you have but if its over 120k on the stock converter this could very well be the case. If you are having some powerloss you could have completely melted the cat giving you an increase in back pressure bogging you down
 
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