Fuel pump could be shot
it is ok to continue driving the vehicle while the catalytic converter is not working properly?
Creates excess hydrocarbon emissions.
A plugged catalytic converter could be the culprit.
destroy the catalytic converter
possibly a clogged catalytic converter
Dirty fuel/air filter. Plugged/damaged catalytic converter.
yes and its illegal if your car goes through emissions
A bad catalytic converter and stopped up muffler will slow down the car. The catalytic converter is under warranty up to 84,000 miles, if defective. If you ran over a speed bump and damaged it, you have to replace it. You can buy a lower catalytic converter for $120 from advance auto parts.
Most cars won't even run is the converter is clogged. Clogged converters can get very hot, maybe even start fires.
Plugged fuel filter. Plugged catalytic converter.
Hard starting, loss of power, poor fuel economy, and you will fail any emissions test.
Not likely because: Code p0420 refers to a problem with your catalytic converter. The engine computer is able to test that converter by using an oxygen sensor before and after the converter. The computer can only test the converter under very specific driving conditions. If the computer determines that it is a good time to test the catalytic converter it will run the test. It compares the oxygen sensor readings in front of the converter to the readings behind the converter to see if the catalytic converter is functioning properly. If it is not functioning properly it will trigger a p0420. Sometimes if a catalytic converter is on the virge of failing it may fail one test and pass the next. This will cause your check engine light to come off and on every once in a while when the test is performed.