Question about 1996 Mercury Sable

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Does PO0430 mean anything other than replace the catalytic conver

Does the engine code PO0430 on a 1996 Mercury Sable with 96000 miles mean anything other than replace the catalytic converter on bank two?

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  • Anonymous Mar 14, 2014

    I replace the air/fuel filter & both 02 sensors. Could it be the catalytic converter?

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  • Mercury Master
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Yes the front O2 sensor(the one before the cat) could be lazy and cause this also.

Posted on May 25, 2009

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  • Mercury Master
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Catalyst is contaminated or fail.also check for air leaks in exhaust manifold or exhaust pipe.check for weak coils.and bad wires and plugs anything that causes a misfire.

Posted on May 29, 2009

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  • Expert
  • 113 Answers

P0430 is bank 2 converter(drivers side) P0420 is bank one(passenger side). There are 4 o2 sensors, 2 per side. Swap all sensors side to side. If code changes to other side you have a bad sensor. If stays the same , bad converter. You can try additive in gas to clean converter. A good scan tool that graphs all sensors is easiest way to determine problem. P0420 and p0430 are the hardest to fix cheap without a proper scan tool. A decent muffler shop can cut and weld new converters cheaper than changing whole pipe

Posted on Apr 11, 2014

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1 Answer

What could make a catalytic convertor on a 2009 grand Cherokee fail at 96000 miles??


so what does FAIL MEAN



  1. FELL OFF CAR.?


  2. CRACKED OPEN LIKE an egg.?


  3. fails smog test. (can be not cat, but only engine, ask)


  4. rattles. or guts missing (or was hacked by PO)



  5. glows red most the time (engine runs like crap and burned it up)


  6. gross rich engine AFR, the engine is way too rich. 10 cause. ask.


  7. the core melted in to giant slag ball, blocking the path there.


  8. ?? do tell what fails means.?

Oct 20, 2014 | 2009 Jeep Grand Cherokee

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2001 mercury sable diagnostic code p0420


Well the code 125 means the engine is not reaching normal temp which is usually a faulty thermostat.
Code 420 is for a faulty catalytic converter. The code means the O2 sensors are not sending the signals the computer is looking for to gauge the operation of the cat.
Fixing the cooling problem could help the cat, or you may have to replace one or both sensors, and maybe the catalytic converter.
The code 125 needs to be addressed first.

Feb 21, 2013 | Cars & Trucks

1 Answer

I have a 2001 mercury sable with a 3.0 dohc engine. When you start the engine it misses and runs rough till it warms up, it then runs fine


Run the codes,change spark plugs,clean the MAF sensor and always make sure to replace a fuel filter every 30K miles. don-ohio

Dec 31, 2012 | 2001 Mercury Sable

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1989 Mercury Sable GS 3.0L runs rough and idles down and stalls


Sounds like you might have a stuck open EGR valve. Is the check engine light on. I would replace the fuel filter if it hasn't been replaced, also check the air filter.

May 31, 2010 | 1989 Mercury Sable

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The Warning Light "Service engine soon" came on. We have a 2001 Mercury Sable. How many miles can the car be driven before dealer inspection?


This light means that the computer in the car has sensed a problem with something on the car. You should take the car to a local auto parts store and have them read the codes from the service engine light. Post the codes they give you here and we can help more. Most likely you wont hurt the car by driving it with that light on. Better to ba safe then sorry thought.

Mar 02, 2010 | 2001 Mercury Sable

1 Answer

Is it wise to buy a 2002 mercury sable with the 3.0 OHV engine with 28,000 original miles? Are these engines dependable, attaining high mileage (over 200, 000)?


You can probably expect over 200,000 if you keep up on maintnence with regular oil changes and everything but anything with only 28,000 miles is really good!!!

Oct 16, 2009 | 2002 Mercury Sable

1 Answer

1996 mercury sabel


Maybe it is signaling you to get a check -up. Do you keep good care of it., Because if something is wrong that means your the one doing something wrong also. Well do your best!

Sep 13, 2008 | 1996 Mercury Sable

1 Answer

96 sable


You're approaching 120k miles, and usually a timing belt would be due around every 60k, so you should prepare for that. That's the really comprehensive service that includes a LOT of parts and labor - timing belt, tensioner, accessory belt(s), spark plugs, all fluids, all filters, water pump, thermostat, full inspection, tire rotation, etc.

Aug 09, 2008 | 1996 Mercury Sable

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