2003gtstang

Ok, yesterday driving home i noticed my check engine light came on. These are the codes it threw.

P0420 - Catylsit System effciency below threshold (bank 1)

P0430 - I dont no what this code is?? Does anybody ??????

But i do have a o.r x pipe that i intalled a month ago. Why would it wait so long to throw thses codes????

Anwyas does this just mean it dosent reconize cats??

jrherald420

do you have mil's or a tuner to turn off the rear o2's???

jrherald420

P0430....Catalyst System Efficiency Below Threshold (Bank 2)


heres a code site


http://www.aa1car.com/trouble-codes/

2003gtstang

thanks.. and no i dont have mil eliminators. But i caan turn off my rear 02s. Its thrwowing it becasue theres no cats right?

jrherald420

its throwing codes because of the rear 02 are picking up more unburnt fumes than there should be because of the lack of cats.try turning off the rear o2's and clear the codes that should fix your problem.

2003gtstang

ok will do.. thanks