I made a thread a while back saying I feel an amazing amount of power loss. Yesterday a CEL went on thinking maybe it could be a o2 sensor... wrong. These are the codes I got:

-P0420
-P0430
-P0173

The 1st 2 are something with the cat I believe and the last one has something to do with fuel trim. Any thoughts on the fuel thing?

 

Got A Haynes Manual? There's Also A Sticky With All The Diagnostic Codes.

 

I just checked the codes -P0420 & -P0430 have to do with low efficiencyof the cat. and -P0173 has to do with bank 2 fuel trim problem. Im pretty sure that the fuel trim problem is on due to the cat being bad. Can anyone approve of this statment? Any other idea of what can cause a bad fuel trim.

 

Check on the O2 sensors... They could set off a couple codes themselves...

 

the only o2 sesor that hasnt been changed is my front one.

 

Could be enough to set some stuff off. You gotta start with the obvious and work from there...

 

Yeah i will replace my cat though, Its time. Its 5 years old, its a high-flow one I was driving around with a bad o2 sensor in there for almost 2 months. Im guessing it got clogged up.

 

Probably a good start...

 

Probably a good start...

 

Yeah, I spoke to a teacher in my school he has a 95 maxima and works with nissan. Told me to replace the cat and the front o2 sensor controls the fuel trim for the bank 2 cylinders. So yes you were right about the o2 sensor thank you once again.

 

no doubt, let me know what happens....

 

Damn meng, you hit it right on the spot with very little to go on. Good job payme!!! Good luck with the car, smx.