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Car Forum / Honda Cars / August 2007MIL = P0420
Honda Civic 1997 CX Hatchback 181,000km I got the same code a few years ago. Seems the oxygen sensor that sits 'on top' was no longer functional. I paid for a genuine Honda replacement. Father-in-law has generic OBD-II reader. Same code came up again a few weeks ago. There are no other codes. I did not reset the MIL and have been driving with it on without noticing abnormal gas consumption... I am always afraid of bringing the car to the 'stealership', but I don't feel my usual mechanic can properly diagnose whether it's a lazy $200 sensor or a gunked up $600 cat... Any thoughts, other than bringing it to Honda in & around the Montreal area? Thanks! -- xyz025@hotmail.com I've been driving a 96 Camry for years with the Check Engine light on, when they check the code it's Catalytic Converter, which was OK, it eventually turned out to be Coolant Temperatue Switch, it was corroded badly, all's fine now. Bg > Honda Civic 1997 CX Hatchback > 181,000km > > I got the same code a few years ago. Seems the oxygen sensor that sits > 'on top' was no longer functional. How was that tied to the P0420 code? P0420 has nothing to do with the primary sensor. See here for more info: http://www.tegger.com/hondafaq/p0420.html > I paid for a genuine Honda > replacement. Did anybody try simply resetting the ECM and waiting to see if the same code recurred? > Father-in-law has generic OBD-II reader. Same code came up again a few > weeks ago. There are no other codes. I did not reset the MIL and have > been driving with it on without noticing abnormal gas consumption... You won't notice a thing with a P0420, but you might with a different code. > I am always afraid of bringing the car to the 'stealership', but I > don't feel my usual mechanic can properly diagnose whether it's a lazy > $200 sensor or a gunked up $600 cat... It is an absolute certainty that a "gunked up cat" is not at all one of your worries here. See here for more info: http://www.tegger.com/hondafaq/p0420.html > Any thoughts, other than bringing it to Honda in & around the Montreal > area? You'll never bring it to Honda no matter where you go. Honda Canada Inc. does not service customer vehicles. If you're suspicious of garages that have paid for a Honda franchise, then you'll have to find a good independent somewhere with the same sort of Honda-specific knowledge, information and experience the dealer has. Good luck. Have you asked the, uh, "stealer" if there any outstanding TSBs or HSN articles addressing your problem? Non-franchised outlets will not likely have access to these.  SignatureTegger The Unofficial Honda/Acura FAQ www.tegger.com/hondafaq/ >> Honda Civic 1997 CX Hatchback >> 181,000km [quoted text clipped - 30 lines] > See here for more info: > http://www.tegger.com/hondafaq/p0420.html to emphasize your comment: "A long, hard, highway drive may cook off enough of the contaminants that the cat may start working well enough again to turn off the light." that is indeed true. catalysts need to run hot to be efficient. just pottering along is not good enough. need to take the car out for a blast every so often. it keeps the catalyst working, burns the carbon out of the cylinders and cleans the spark plugs too. >> Any thoughts, other than bringing it to Honda in & around the Montreal >> area? [quoted text clipped - 10 lines] > articles addressing your problem? Non-franchised outlets will not likely > have access to these. >How was that tied to the P0420 code? P0420 has nothing to do with the >primary sensor. Thanks for the reply Tegger. Actually, it got me thinking and it seems the last time I got P0420 was in August 2004. It coincided with some 'rattling' noise coming from the exhaust. The dealer's remedy was to replace two (2) exhaust 'donuts'. The car still has the original muffler and there is no rattling that I know of... For now, I think I will try to find some Techron (Tactrol here in Canada) and reset the MIL. The cracked exhaust manifold warranty extension ran out about 2 years ago. Thanks again your thoughts Tegger. -- xyz025@hotmail.com The dealer won't analyze it either. P0420 he will just replace the Cat. With a good OBDII scanner you should be able to analyze the )2 sensors. For some info read this tip http://www.troublecodes.net/articles/catfailure/ > >How was that tied to the P0420 code? P0420 has nothing to do with the >>primary sensor. [quoted text clipped - 18 lines] > -- > xyz025@hotmail.com |
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