P0420 is one of the most common error codes it means your catalyst system efficiency below threshold near engine bank one which indicates that the catalytic converter is not functioning efficiently so the vehicle is increasing the output of harmful pollutants
Simple 3 DIY Methods :
There are the three simple DIY methods we can try to solve this problem
Method A – Catalytic Converter Cleaner
We use a catalytic converter cleaner there are many different kinds of cleaner normally it’s all under 20 simply pour the cleaner into the gas tank then you can drive your car for 150 miles or run the engine at about 2500 rpms for 30 minutes to run the cleaner through method b wash the catalytic converter
Method B – Wash the Catalytic Converter
The first thing you need to do is to remove the catalytic converter from your vehicle then get a bucket put some detergents open it and foam it up put the catalytic converter into the solution soak it up for 10 hours to remove all the crud that’s inside of it We can see by looking inside the converter there are all kinds of little honeycomb shapes they clog up really easy and cleaning will often make them open and work again method c modify oxygen sensor
Use a Half Inch Drill to Modify
We can remove the oxygen sensor from the converter and fix po420 by putting an extra space between the sensor and the converter first get a spark plug non-fowler and then use a half inch drill to refit it by doing this the spark plug non-fowler is now having enough space to fit into the oxygen sensor put them together and put them back on the catalytic converter if you find refitting the component is too complicated you can also get some parts like oxygen sensor extender or oxygen sensor socket to create that space
There are the three of the most practical solutions to fix the po420 error code
Claim a FREE Engine Code Eraser
after the repair you can now use the zeus app to clear the error code and tap the rescan button one more time to make sure everything is fine with your vehicle
