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code po 420

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Old 20 Apr 2014, 01:34 pm
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Join Date: Apr 2014
Posts: 19
Default code po 420

getting this code and from looking at the fault code list else where on this site i have either a faulty lambda sensor or a failing cat.
now the sensor will be my first port of call to fix this code but after a Google search i find that there a afew manufacturers of these and this has left me a little confused as to what would be the correct one to get

ok car is
2004 2.l classic with 107k miles on the clock full dealer stamped history and cambelt done at 96k miles. car is in all round good conditin and have had independant mechanic look at car and all is good with suspension brakes etc .
lots of new parts including new fuel tank at some point in the not to disant past as the white paper sticker that is on the bottom is still clean and fully readable.

is there a "howto " on replaceing the rear o2 sensor or a wrong way to do it? or is it a simple spanner and penetrating spray then unplug and repeat to install the new part?

any hel advice or just plain daft answers welcome
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Old 20 Apr 2014, 07:03 pm
randyincctx's Avatar
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Join Date: Jun 2013
Location: Corpus Christi,Tx.
Posts: 3,485
Lightbulb Re: code po 420

It's fairly easy,and straight-forward.....My main tip would be to pick up a can of PB Blaster,and saturate the nuts really good and give it time to penetrate(let IT do the hard work 4 U!);The rest of the tips you can find in this video,since the O2 sensor for Dodge Neon,is virtually the same:

2003 PT Cruiser (Base-N/A) Patriot Blue Pearl Purchased @ Police Impound Auction for $1,000.
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Old 21 Apr 2014, 06:01 am
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Posts: 19
Default Re: code po 420

ok thats a simple and straigt forward swap out , just need to find the correct o2 sensor now and then get it done, any ideas on what sensor it should be?
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