Big Jim, I will take a stab at it.
"one thing do not just change your O2 sensor,"
Correct. Nobody suggested just to change the O2 sensor.
" if you have either P0420 or P0430 best is go a head change catalytic converter."
Yes, this would be a good idea but first he should try the cheap ones first. 5 bottles of Berrymans B12 is about $25. $2000 for both precatalytic converters.
" cause I have both code show at 148000 miles, and i didn't clean then i had both catalytic converter change new and also change the O2 sensor the same time, so it will be fresh and clean. even thought that if you clean the cat, after few miles the same code it will show again with out any question to ask."
Yes, if the precatalytic converters are past its point of usefulness, the codes will appear again.
" I am not sure how much it will cost for just clean, but the money you use for clean you can add little bit more to have mechanic to put a new one on and it will last you for another 100,000 or more miles."
Once again we are talking about $25 as opposed to $2000.
" what the P0420 and P0430 is really are Intake Manifold Catalytic Converter *IMCC*. it was a intake manifold with Catalytic converter underneth."
P0420 and P0430 are for Bank 1 and Bank 2 Precatalytic converters, respectively. They are sometimes listed as Exhaust Manifolds as it is designed and manufactured into the EXHAUST Manifolds.
"always remember on the Duratech V6 has 3 Catalytic converter."
Our V6 Duratecs have 2 Precatalytic converters and 1 Main Catalytic Converter.
" when I got my change in the dealer, it was like $750 each include labor, parts and tax. if you just clean it and reset the computer, either way it will still show after few miles later. trust me, i did all those untill now i change both Intake Manifold Catalytic Converter."
Mileliminators ($30 from
www.mileliminators.com) installed correctly will prevent the P0420 and P0430 codes from appearing.
DavidC11, please do not post about P0420 and P0430 codes until you are clear how it works as you are only confusing the CEGers who really need the help. Thanks.
Here is some good reading information.
http://www.v8sho.com/SHO/TSB0197HO2SServiceTips.htm
