Question about 1999 Isuzu Trooper

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How many Catalyic Converter on my Trooper? I was told 2 one on the right side and one on the left side. Also how do you know when they are going bad.

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You should have 2, these will either send you a code, or sometimes the baffles inside will break loose and rattle. The biggest problem, if these get clogged or stopped up this will cause back pressure to your engine and cause more damage than you would think. It's more less to check the function of them, you can have a emission test done. Aftermarket converters are fine which are about $350 but OEM are around $1000

Posted on May 07, 2010

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Posted on Jan 02, 2017

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Where is the O2sensor bank 1 at with a code of P0420. AND do I need to replace both sensors upstream and down. Or just the one that is showing up on the obd scanner.


Bank one is front side of cat. It should also tell u if it's cat 1 or cat 2. Depending on make an modle an yr. Catalyst 1 bank 2 is left cat back sensor. Catalyst 2 bank 2 is right cat back sensor. U do not have to replace upstream also. My o2 sensor Catalyst 2 bank 2 went bad. Had engine code for burning rich bank 2. Replaced tha down stream sensor an fixed problem runs better an better gas. This was in 97 gmc suburban. Idk what vehicle ur askin about. An I'm not to familiar with much about cars jus trucks an suvs.

Jan 02, 2017 | Cars & Trucks

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What is bank 2 sensor 1?


You must have v-6 or v-8 engine , bank determents the side of the engine and on yours bank 2 is the passenger side, an sensor 1 denotes before the catalytic converter .You vehicle has three o2 sensors ,two before the cat an one after .Up stream means before catalytic converter. / downstream after the catalytic converter .

Jan 22, 2015 | 2003 GMC Safari

1 Answer

O2 bank 2 sensor 2 replacement


It's on the driver side by the catalyic converter.

May 25, 2013 | 2010 Lexus ES 350

1 Answer

Check Engine Light came on. Had a dianogistic check indicating faulty Oxygen Sensor. Exactly where is the sensor located...was told 'upstream or downstream' of catalyic convertor. Accessible from under...


Oxygen sensors are located in your exhaust usually 2 - 1 upstream (in front of cat.converter) 1 downstream (behind cat.converter) and from under the vehicle.

Mar 15, 2011 | GMC Yukon Cars & Trucks

1 Answer

I have a 2001 Ford Explorer sport tac. I am hooking up a small fishing boat trailer to the truck ( the wiring on the trailer is new and installed correct). The problem: When I turn on the left or right...


You have one of two problems. Either there is a bad ground on your tailer, or the vehicle side trailer connection is bad. The Sport Trac is a 2 wire system and does not require a converter it would only need a 4-flat hardwired in. If you have a 3-2 converter installed good chance that is the problem seeing that the stop and turn wires on the input side would be wired to the same wire, which would explain the turn signals going off when the brake is depressed. If you have a converter installed simply ground the brake lead on the input side of the converter and your problem should be resolved.
For more hitch and wiring information please click here.

Feb 18, 2011 | 2001 Ford Explorer Sport

1 Answer

My 2001 trooper went from 19 miles to the gallon to 10, over night. Took it in for a slipping feeling and the first place told me transmision oil is burnt. Told me I need a new catalytic converter and...


well, i must admit, that transmission fluid does not turn lrown overnight and should have been one of the things that firestone should have checked.......not to mention the cat converter....

my advice is it does sound like your transmission will require an overhaul, as inside the transmission there are things called bands which are friciton material (similar to brake pad material) and they surround the drum...and when this friction material comes off (wears) it gets absorbed by the oil and turns it from red to brown, and if you smelt it, it would smell like burnt toast.,....bad smell.....

due to the nature and cost of the job, I would look around for at least 2 quotes and see what you come up with, i would not necessarily go with the cheapest but with the person who treats you the right way and is upfront with everything....

It was good that you cam on here and asked us to provide you with info...if there is anything else we can do, please do not hesitate ....

Aug 26, 2010 | 2001 Isuzu Trooper

1 Answer

Codes are Po442,PO420,PO131 and PO401.I beleive these all have to do with exhaust emission or leaks


okay po442 isevap leak check gas cap amd right front tower in engine check evap line for broken hose,po131 bad o2 sensor top sensor on rear exhaust manifold,po420 is bad catalyic converter but could be o2 sensor.i would replace o2 first reset eng lingt and go from there, hope this helps good luck.

Oct 07, 2009 | 2003 Dodge Caravan

1 Answer

I pulled the 3 wires out of the plug on my 98 isuzu trooper and dont know how thay go back in order can you help me plz


For the 3.2l dohc v6 it is 1,2,3,4,5,6. with the cylinders being numbered from front to back and left to right 1,3,5,right and 2,4,6 left. The left and right side of the vehicle is determined from you setting in the drivers seat For the 2.6l 4cyl it is 1,3,4,2 starting with the right front wire and going in counter clockwise direction, and the cylinders are numbered from front to back 4,3,2,1. hope this helps out

Jul 05, 2009 | 1998 Isuzu Trooper

1 Answer

Catalyic Converter


Yes, most cars and trucks have 3 cats when they are V6's or V8's. Yoy have one cat on each header bank and then right after the two headers become one there's one more.

Good luck

Jul 18, 2008 | 1990 Ford F150

1 Answer

My 2000 Isuzu Trooper needs a catalytic converter.


yes they have 2 cataletic convertors, one each bank
there is EGR codes, but only front O2 sensor codes and fuel trim codes no CAT codes
what were the scanner codes or flash codes i can work with both for helpful info
you can read codes by bridging pins 5 & 6 with ignition in on position engine not running


eb2c10d.jpg

Jul 16, 2008 | 2000 Isuzu Trooper

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