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#446216 09/26/02 07:14 PM
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my check engine light came on today, so i ran straight to autozone and got it checked. i need a new 02 sensor. is it easy to install, could someone please tell me how. thx.


Russell Oval Port 3L Nearly Done MTX75 w/ Homebrew Zetec FD and Torsen Complete
#446217 09/26/02 07:25 PM
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4 or 6 cyl? bank 1 or 2? There are several threads on this over the last week or so which cover most possibilities.


Scott 95 SE-2.5L ATX (Sold, but not forgotten...)
#446218 09/26/02 07:36 PM
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6cyl

bank 1 i think


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#446219 09/26/02 09:28 PM
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Upstream or downstream? Or 95? (Upstream only ) Bank 1 is next to firewall.


Scott 95 SE-2.5L ATX (Sold, but not forgotten...)
#446220 09/27/02 04:00 AM
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im almost positive it was this code

P0420 Catalyst System Efficiency below Limit - Bank No 1.

might have been p0421 though

so, anyone know how to fix it?


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#446221 09/27/02 10:19 AM
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Try running some high test gas I did and light went out


1999 GREEN Contour SE SPORT Duratec V6, ATX, SUNROOF, 93,000 Miles, P0420 ON&OFF -replaced DS O2 --did not FIX *New TORQUE CONVERTER @ 53,000-Intermittent P1744 *New DASH at 53,000 and New DASH lifted-now using MOLLEY bolts to pull down
#446222 09/27/02 01:40 PM
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Originally posted by PoopStainz:

P0420 Catalyst System Efficiency below Limit - Bank No 1.

so, anyone know how to fix it?

This code would be triggered by the O2 sensor after the pre-cat. This is easy to change from under the car. This is the downstream sensor for bank 1 which should be available at most parts stores.



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#446223 09/27/02 01:41 PM
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Autozone will check and run trouble codes for you? Do they charge for this? Will they do it for any year Contour? Thats pretty schweet.


--Ken 96 SE MTX Black, KKM Tru-rev, SVT Exhaust, SP/KVR brakes. Now if only I could drive...
#446224 09/27/02 01:43 PM
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No charge..any year..


95 Contour Zetec, ATX (wrecked, sitting in the barn) 95 Mystique Zetec, MTX 2000 Taurus SEL 3.0L Duratec 1994 Crown Victoria LX 4.6 V8 1993 Chevy Silverado 4.3 V6
#446225 09/27/02 04:30 PM
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Originally posted by contoured:
Try running some high test gas I did and light went out


i run nothing but 93 from 76


Russell Oval Port 3L Nearly Done MTX75 w/ Homebrew Zetec FD and Torsen Complete
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