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2005 Altima 2.5L P0420 Code Forums > > 2005 Altima 2.5L P0420 Code 2005 Altima 2.5L P0420 Code
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  #16  
Old 10-27-2019, 11:31 PM
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smj999smj smj999smj is offline
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P0420/P0430 don't always mean a bad converter, but sometimes they may trigger because of a bad converter. Those codes are catalyst efficiency. If an engine isn't running properly, i.e. too lean, too rich, a misfire which can be caused by a number of things, including a bad intake valve, it will affect the emissions and could very easily cause catalyst efficiency codes to trigger.
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  #17  
Old 10-28-2019, 11:54 AM
[email protected] kleavitt1967@gmail.c is offline
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Thank you I will try that 1st
I know that the previous owner replaced a bunch of things including : the timing chain set cam sensor - crank position sensor - spark plugs - head gasket -water pump -t-stat & housing -valve cover set - radiator cap - front engine mount - oil filter -air filter - and air duct (air horn) total cost 2442.00 any other advice?
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Last edited by [email protected]; 10-28-2019 at 12:06 PM. Reason: adding info
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Old 10-28-2019, 12:04 PM
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I see well I know that the previous owner replaced a bunch of things including : the timing chain set cam sensor - crank position sensor - spark plugs - head gasket -water pump -t-stat & housing -valve cover set - radiator cap - front engine mount - oil filter -air filter - and air duct (air horn) total cost 2442.00 any other advice?
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