What is your question?
·
·
What is your question?
My car starts to sputter around 35 miles an hour I read the code and it said it was the catalytic converter how do I tell if it's the upflow or the downflow
1 Reply
Cats do fail, however typically because of something. Sensors should be monitored via a quality scan tool to verify the actual readings as well. That diagnostic time spent will not only verify a failed component, but if done correctly can identify why and what steps are needed to prevent it. The efficiency of your engine has a direct influence on your oxygen sensors and cats. Be good to your car and it'll return the favor, getting the actual failure proven will be good to your wallet.