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Code P0430 on a Lincoln LS v6 3.0 - 2005 Lincoln LS V6

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Posted on Jan 02, 2017

  • 5 Answers

SOURCE: 1997 lincoln town car 4.6 with a p0430 fault code

I will make an assumption here, we know what the root word means. This code was extracted from the computer by? What this is telling you one of 2 things: The Bank 2 oxygen sensor down stream of the catalytic converter (there are 2 converters, one for each bank of cylinders on the 4.6ltr engine) is bad and/or that the Bank 2 catalytic converter is no longer doing the job it was designed to do. Simply, Catalysts wear out. They are good for approx 100,000 miles (as required by Federal Law). Again, I assume that the reason the intake manifold was replaced was because it had a crack in one, or more, of the runners? (part that feeds the head of a manifold). It may have taken a while to find this as being the cause of why the car running incorrectly, maybe rough. This means, that during the time the car was being driven with the problem, the amount of unburned, or not within spec exhaust gases, coming off the side of the engine affected by the intake issue was higher than normal. This out of balance level of exhaust gases were being dumped into the converter on that side of the engine, thus causing the converter to have to run hotter, work harder, or even at the time the gas was being processed through, causing deposits to be formed in the converter, thus shortening it's life span. The Bank 1 side of the engine, apparently, did not have the issue and it's catalytic converter's life was not affected. I hope this makes sense to you.

Posted on Aug 19, 2009

  • 234 Answers

SOURCE: HOW DO YOU REPLACE O2 SENSORS ON LINCOLN LS 03

Those codes represent bad or inert catalytic converters. Putting in new o2 sensors only costs you money. If the car has less than 80,000 miles then, your nearest Lincoln dealer has to put on new ones per federal mandate. 8 years or 80,000 miles, pcm and cats are covered.

Posted on Nov 10, 2009

  • 753 Answers

SOURCE: lincoln ls has a trouble code p1336 and po350

P0350 is Ignition coil primary/secondary circuit malfunction,could be faulty igntion coil or module.P1336 is crankshaft position system variation not learned.This is done with a Tech2 at your local dealership you would be best served taking this car to your dealer to have it diagnoised.

Posted on Jan 11, 2010

SOURCE: i have trouble codes p0430, p0301,p0316, p2195 and

PO-430 Catalyst System Efficiency Below Threshold (Bank 2)
PO-0301 Should be a misfire on COP Coil #1
PO-316 Misfire Occured in the First 1000 Engine Revolutions
P-2195 Lack of HO2-11 Switch/Lean
P2197 Lack of HO2-21

I have the same vehicle,only a V8
What you have is a very common ford problem. The Ignition Coil on Cylinder #1 is Bad. You can buy it at the local auto part store and change yourself. About $59.00. You remove the coil cover on top of the valve covers,then the coil. I did one in Feb and believe all you need is a 7mm wrench and 7mm socket. #1 should be at the front of engine/pass side.

The other codes are related and you can see if any are there,after you do the coil replacement. If so give them to me.

Posted on Apr 15, 2010

  • 55 Answers

SOURCE: 200 lincoln ls 3.9 codes 171 174 300

171 and 174 mean it is running lean and 300 means a random cylinder misfire

Posted on May 24, 2010

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P0420 p0430 p0750


Code 750 is a problem with one of the shift solenoids inside the transmission.
Code 420 is for the catalytic converter performance bank one and code 430 is the same thing for bank two. The codes mean the cat is not performing up to standards based on the data coming from the O2 sensors. Sometimes it a sensor problem, and sometimes its a cat problem or something in the fuel system.

Feb 11, 2014 | 2003 Lincoln LS V8

2 Answers

I have a code P0430 on a Lincoln after changings all coils on a 2004 Lincoln V6, what caused and How do I fix it?


P0430 is Catalyst System Efficiency Below Threshold (Bank 2).

A code P0430 may mean that one or more of the following has happened:

  • The catalytic converter is no longer functioning properly
  • An oxygen sensor is not reading (functioning) properly
  • There is an exhaust leak

First, inspect for exhaust leaks.

Next step is to measure the voltage at the oxygen sensor on Bank 2. In fact, it would be a good idea to test each oxygen sensor while you're at it.

Aug 07, 2011 | 2004 Lincoln LS

1 Answer

Air bag light on 2000 lincoln ls flashes 9 and one times...code 91 means what? thanks,,,mike


I have checked 200 and 2001 Lincoln Ls, both 5 and 8 cyl engines.

I can't find a code 91....I can find code 109....thats Barometric sensor.

Do you have more info>

Jul 22, 2011 | 2001 Lincoln LS

2 Answers

I have p0430, nothing else? 2004 LS V6. What is it?


This code that camenupnpointsnto a problem with your cadilatic converter. Take it to a local shop you trust and for free they can put it on there machine to confirm this and give more details of solution and cost. Please keep me informed, let me know if this helped by the 4 thumbs up clicked on. Thanks mike

Jun 18, 2011 | 2004 Lincoln LS

2 Answers

2003 Lincoln ls, v6, 3.0L has code p0430 for catalytic converter effeciency below threshold. Bank 2. What side is Bank 2 and all the parts I will need?


The number 1 spark plug is in bank one. ineffective cat's is a hard code to dianose correctly as thiers many things that can cause the code to set and many temporary things that don't last long that can set the code. I won't try to fix this code if it's the on;y one untill it has been reset more than a few times and no othe codes come up. The oxagen seners can fail, There's four! And they conpare readings with each other to set this code. running though water and cooling one or some of them will set the code. changing to a newq tank of gas that some different burning qualities will set this code ( and once resetr might not reset again till the next seasoal chnge in the fuel mixture from Summer to winter gas happens as it cools or warms again or even going from one staste to another to but fuel as thier polution laws are different or even some areaas that require special fuels like E85. Your car can run on it just fine if all systems are in good order but it might set the code as the system retunes to the differeent fuel. Code 420 also follows this same story.

Apr 04, 2011 | 2003 Lincoln LS

1 Answer

03 ls v6. p0430 catalyst malfunction lean bank 2. Vehicle has loss of power and exhaust sounds loud on the drivers side when I get on it a little bit. Do I need a new cat?


Before you invest in a new catalytic converter get the exhaust leak fixed, especially if it is before the cat and O2 sensors. An exhaust leak will allow air in and the sensors will not read accurately. This could show up as a code. Get the codes cleared after the leak is fixed and see if it comes back. It probably won't. Hope this helps.

Dec 17, 2010 | 2003 Lincoln LS

2 Answers

I have trouble codes p0430, p0301,p0316, p2195 and p2197. thecar is a 2004 lincoln ls 3.0 v6 with 116000 miles. can anyone help me solve my problem?


PO-430 Catalyst System Efficiency Below Threshold (Bank 2)
PO-0301 Should be a misfire on COP Coil #1
PO-316 Misfire Occured in the First 1000 Engine Revolutions
P-2195 Lack of HO2-11 Switch/Lean
P2197 Lack of HO2-21

I have the same vehicle,only a V8
What you have is a very common ford problem. The Ignition Coil on Cylinder #1 is Bad. You can buy it at the local auto part store and change yourself. About $59.00. You remove the coil cover on top of the valve covers,then the coil. I did one in Feb and believe all you need is a 7mm wrench and 7mm socket. #1 should be at the front of engine/pass side.

The other codes are related and you can see if any are there,after you do the coil replacement. If so give them to me.

Apr 13, 2010 | 2004 Lincoln LS

1 Answer

HOW DO YOU REPLACE O2 SENSORS ON LINCOLN LS 03 3.0. THE ODB2 READING CAME BACK WITH P0430 P0420. DOES THIS JOB REQUIRE A MECHANIC OR IS IT EASILY REPLACED?


Those codes represent bad or inert catalytic converters. Putting in new o2 sensors only costs you money. If the car has less than 80,000 miles then, your nearest Lincoln dealer has to put on new ones per federal mandate. 8 years or 80,000 miles, pcm and cats are covered.

Nov 09, 2009 | 2003 Lincoln LS

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