Question about 2003 Lincoln LS
Code p0430 could mean that you catalytic converter is no longer "cleaning" your exhaust gases. In your car, it's possible to have more than one catalytic converter (V6 engines have two banks of cylinders and could have a cat on each side).
Bank 1 is the side of the engine where cylinder no. 1 is located. Bank 2 is, you guessed it, the other side. If you look up the firing order of the engine, you will see which cylinder is #1.
Although catalytic converters are not cheap, it is recommended that they be replaced in pairs due to the fact that the other catalytic converter may trigger your "check engine" light soon after you replace the first. Also, it may also be a good time to throw in new oxygen sensors.
Posted on Apr 04, 2011
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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Posted on Jan 02, 2017
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A code P0430 may mean that one or more of the following has happened:
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.
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