Question about 2003 Lincoln LS V8
Im not sure what to do i know that 420 and 430 is bank 1 and 2, but i dont know much about cars and im trying to larn but idk what all i need to do. Also i cannot find anything on po-750
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.
Posted on Feb 11, 2014
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Posted on Jan 02, 2017
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
bank 1 is the side were the #1 cylinder is. po420 catylist below threshold ( bank 1 ). if your check engine light is on for a P0420 code( bad converter ) and you decide not to fix it, another more serious code could be triggered and you'd never know. it could the back 02 sensor also, behind convertor. have a mechanic check it out.
Posted on Mar 20, 2011
SOURCE: 2003 Lincoln ls, v6, 3.0L
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.
Posted on Apr 04, 2011
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