Q: Catalytic converter
My car started to make this "clicking" sound, when i start my car it began, when increase the rpm, it makes it go faster, i recently changed the radio in my car, i also had the P0420 code pop up so, also i haven't changed my oil since i got the car like 3 months ago,so could have on of those three thing might have cause it.
My car has 190000 miles.
My car has an automatic transmission.
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