Question about 2006 Nissan Xterra OR
Put in a tank of rich fuel and injector cleaner (the cheap **** from the gas station), the light stayed off for a few weeks - and vehicle also passed emissions. Light just returned with the same Cat code (P0430). Engine is running lean, I've checked for air leaks with a smoke machine, couldn't find anything.
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Posted on Jan 02, 2017
SOURCE: P0430 code
Your pre-cat is designed to scrub the exhaust before it reaches the larger catalytic converters, and until you replace that your problem will still come back. Try buying one in good shape from a salvage yard before blowing $500 on a new one.
Posted on Mar 14, 2010
Here are the most common problems,
Air leaks at the exhaust manifold or in the exhaust pipes. Catalytic converter is damaged, contaminated or has failed. Front HO2S or rear HO2S is contaminated with fuel or moisture. Front HO2S and/or the rear HO2S is loose in the mounting hole. Front HO2S older (aged) than the rear HO2S (HO2S is lazy)
Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with one of the components or sensors it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and you need to diagnosed and repaired it. Autozone turning the light off does nothing for you, and is against their company policy. If you do not have the proper tool, reference materials or experience I would take it to a professional. Finding out the trouble code is just he start of the diagnosis process.
Posted on Mar 07, 2010
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