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Truck of the Month September 2009  |
Hello everybody !
I have P0420 error on my OBDII Scanner. It's cathalyst error... Do I change my two cathalyst tube ? What the best trade for news cathalyst ? Lambda sensor need to be change too ? Thanks for your answers. (scuse for my english... lol) From FRANCE! 2004 Dodge Ram 1500 Quad Cab 5.7L Hemi Laramie 4x4 Long Bed LPG 1981 Ford Bronco 4.9L XLT Ranger 4x4        |
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"Mark" Forum Manager Former Hemi truck & Hemi SUV owner  |
P0420 is an issue with your rear O2 sensor... have you done any mods to your exhaust system?
______________________________________________________________________________ HTC.com web site HTC.com store HTC.com calendar HTC.com National map After smoking a pack a day for 30 years, I quit cold turkey. Here's how I did it...  2003 Ram 5.7 Hemi - Supercharged. 520 HP, 14 mpg... traded in for a 2006 SRT8 Grand Cherokee - bone stock 6.1 Hemi - 420 HP, 16 mpg... traded in for a 2007 BMW 335i - twin turbo. 330 HP, 33 mpg                |
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Truck of the Month September 2009 |
No mods on my exhaust system...
I have to put off both mufflerss this weekend to see. No difference of code error. I put back the mufflerss just to run this week because I has to make many miles. Do I have to change my 02 sensor ? The last week, the motor is stop alone by driving! Twice! O2 problem ? From FRANCE! 2004 Dodge Ram 1500 Quad Cab 5.7L Hemi Laramie 4x4 Long Bed LPG 1981 Ford Bronco 4.9L XLT Ranger 4x4 |
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"Johnny"  |
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
Thats what your code means, probably a bad CAT, but i would replace the o2 first it's cheaper. May have something to do with converting the truck to LPG, I don't know for sure just a guess. If you replace the o2 make sure it is a factory one, the aftermarket ones tend to be a problem. 2004 RAM 1500 SLT R/C S/B Pacesetter LT's w/ Hi-flow cats and 3" Y, Dynomax Ultraflow, aFe highbreather, AirAid M.I.T. and Taylor Thundervolt 8.2 long wires SCT TUNED by Hemifever   |
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Truck of the Month September 2009 |
Thank you for your answer.
I think it's because LPG AND Ethanol conversion... I drive with 50% E85 and LPG. Everybody in France drives American V8 with Ethanol or LPG. Except the old cars (... but I have see in France 72 Charger with LPG system !) From FRANCE! 2004 Dodge Ram 1500 Quad Cab 5.7L Hemi Laramie 4x4 Long Bed LPG 1981 Ford Bronco 4.9L XLT Ranger 4x4 |
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That's the code I've been throwing more recently with no cats. Even though I haven't had cats for 18 months I just started getting this code a few months ago
1959 Buick Electra 4 Door Sedan 1959 Pontiac Star Chief 4 Door Hard Top 1976 W200 Dodge Power Wagon 383/ 727 4x4 1986 W100 Dodge Power Ram 318/ 4 speed 4x4 2007 Dodge Ram Single Cab Long Bed - almost no options except posi and HEMI! www.Pontiac-59.com |
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