P0420 is a code involving O2 readings being off specs. It doesn't always signal a bad cat. Can be a bad O2 sensor. P0420 is bank 1, meaning up front sensor. Sometimes the sensors go bad due to not tuning the vehicle up and keeping things running smoothly. A misfire/bad plug/bad wire can result in poor fuel economy, poor engine performance and over time clog the O2 sensor(s). With the relative young age of your vehicle, I'd suspect the upstream O2 sensor. Converter don't go bad too easily and are very expensive.
Legally you can only replace a catalytic converter with another catalytic converter.
Replace the catalytic converterReplace the catalytic converter
Replace the catalytic converter.Replace the catalytic converter.
Replace the catalytic converter.
Yes you can replace a catalytic converter. No you cannot replace it with resonators. It is illegal and the engine will not run correctly.
The Titan booster does not have a catalytic converter
A catalytic converter may last the life of the car. There is no set time to replace it.
There is no cleaner for a catalytic converter. If it is stopped up you must replace it.
How much does it cost to replace the catalytic converter on a 1999 Toyota Tacoma
The catalytic converter should be bolted onto the exhaust pipes. The bolts will have to be soaked in penetrating oil to be able to break them free, then you can replace the converter.
You don't. You replace it.
You replace it.