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Joined: Jul 2002
Posts: 30
New CEG\'er
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OP
New CEG\'er
Joined: Jul 2002
Posts: 30 |
I have a '98 SVT Contour with 58k miles. My CEL has been coming on for the past several months. There are NO drivability issues and when I clear the code by disconnecting the battery, the CEL doesn't come back on for 2-3 weeks.
BTW, during one of these 2-3 week periods, my car passed state emissions.
I had the code scanned at Autozone and the two codes were,
P430 and P420...with the message "Cats below threshold".
Any ideas? And why would the CEL stay off for a while when the codes are cleared?
Thanks guys.
Last edited by Black EO; 12/04/02 06:08 PM.
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Joined: Nov 2002
Posts: 3,506
Hard-core CEG'er
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Hard-core CEG'er
Joined: Nov 2002
Posts: 3,506 |
I ran into a similar problem only my code was 460. I too also passed somg and my CEL never came on during it so that was good. My problem is that one of my Pre-Cats is busted.....but i don;t think thats it...if it were i'd notice a back up or unsmooth air flow...it seems to work fine....im thinknig of replaceing my O2 sensors and see if that fixes the problems( i can get them really cheap because i work for a parts wholeseller). Im also thinking of adding Sp Motorspots O2 enahncers wich are just wire harnest that attach to the o2 sensors that prevent false readings by changing the voltage ( good for custom exhaust)
The O2 enhancers might work for you. Ther 64 dollars at SP Motorsports for one pair ( and there is 4 on a v6) if your having no problems with passing smog this should cure you...but if you barly passed smog, I would not get them just yet...you could very well have a bad CAT, and that can get worse with time.
ROZ
3.0 SVT hybrid...all the fixens...Track/Race ready very soon!!!!!! 20,000 + miles
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Joined: Dec 2001
Posts: 667
Veteran CEG\'er
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Veteran CEG\'er
Joined: Dec 2001
Posts: 667 |
P0420=Bank 1 catalyst system efficiency is below the acceptable threshold P0430=Bank 2 catalyst system efficiency is below the acceptable threshold There are many posts that deal with these codes, here is one of them: http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=53534If you use the search feature, you will find a LOT more.
96 Contour SE
Duratec V6 24-valve 2.5L ATX
108,000 mi.
Replaced: crankshaft w/ DMD, EGR valve (clogged), EVR, DPFE, PCV valve, evap emissions hose & tube (cracked), window regulator (broken), LH & RH PCV tubes, UIM gasket (leak), ignition coil
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Joined: Sep 2002
Posts: 192
CEG\'er
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CEG\'er
Joined: Sep 2002
Posts: 192 |
I had identical problem
I installed 1 downstream CAT O2 sensor [ bankk 1] and CEL light has been off for 3 weeks
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
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Joined: Jul 2002
Posts: 30
New CEG\'er
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OP
New CEG\'er
Joined: Jul 2002
Posts: 30 |
Originally posted by contoured:
I had identical problem
I installed 1 downstream CAT O2 sensor [ bankk 1] and CEL light has been off for 3 weeks
How did you figure out which o2 sensor? And if you cleared your codes, did your CEL stay off for a while like mine did?
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Joined: Sep 2002
Posts: 192
CEG\'er
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CEG\'er
Joined: Sep 2002
Posts: 192 |
The CEL for 420 or 430 require THREE cycles of your engine [1 cycle = ~20 miles of computer required driving]to activate the CEL light [pulling fuses or disconnect battery does the same thing immediately]. This also works in reverse [3 good cycles of no bad O2 inputs the CEL goes out]
Buy at least one downstream O2 sensor and check codes after resetting CEL [Autozone]
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
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