Replacing the catalytic converter will. I went to the exhaust shop this monday, and my axle back had a huge leak, but it was in the back, i dont think that would trigger the code, anyways i fixed it, and today the code came up again, im thinking its. A p0420 code signals a problem with your catalytic converter or o2 sensors, often showing up as a check engine light, poor mpg, or sulfur smells
Can a Bad O2 Sensor Cause a P0420 Code? Find Out Here!
Check engine light has been gone for 2 days and 100+ miles, but.
If you are used to filling up the tank right up to the brim, it can cause issues with.
A month ago the muffler guy put my is350 on the hoist and said he didn't see any leaks, meaning that the problem was definitely a bad o2 sensor My mechanic replaced it last week, but the code came. P0420 means catalyst system efficiency below threshold (bank 1) Safe to drive, but fix promptly
We install an o2 sensor spacer to turn off check engine light for codes p0420 or p0430, catalyst system efficiency below threshold. Here's what you need to know about fixing the most common culprits.
