Catalytic converter unnecessary?
November 4, 2009 5:43 AM Subscribe
Do I need to replace the catalytic converter and oxygen sensor in a 2000 Honda Civic (125k miles)? Engine suddenly idling low.
posted by rahnefan to home & garden (17 answers total)
My Check Engine light came on night before last. The technician says the codes it gave are for the oxygen sensor and the catalytic converter (which upon inspection, is physically cracked). They said the purpose of the one is only to detect problems with the other.
But in my experience, a faulty catalytic converter makes zero difference in emissions tests (one went bad in a Toyota I had but for years after, the techs said it was as low on emissions as a new car). We just had this one tested.
My bigger concern is the engine is now starting to idle low, as if it wants to stop, but is that coincidental? I asked the tech but their explanation did not sound confident about a relationship between these parts and low idling. It sounded like, "sure, why not."
Are the parts unrelated to low idling, and do I really need them if the car has low emissions?