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Discussion Starter #21
Update on my O2 sensor/ smog test problem and error code P0420 and P0141. So i did take my truck to the muffler shop and they replaced the front catalytic and also the exhaust manifold gasket, no cracks in manifold. The PO420 check engine was gone, thankfully. I then drove the truck through the drive cycle to reset all the monitors. Took to smog guy and he just hooked up the scanner, no sniffer in pipe. He said there was a problem with rear catalytic that the number didn't come up on his list of acceptable catalytic converters. Had to take truck back to smog shop and spent another $300 to replace rear CAT. Thankfully this muffler shop was able to get it done in a few hours. Went back to smog guy and it finally past smog. Yeah:), but Booo:mad: on the $1100 bill for the CATS. thanks to all of you for your help. The frontier is back on the road, legally..😁
 

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2004 Nissan Frontier XE KC KA24DE
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Did you not clear pending and confirmed codes before going?
 
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