Check engine light
My check engine light came on and my friend told to
check the oil and stuff and everything was fine so I scan it
with my obd2 it game p0420 and so early today I unplug
my battery to some stuff and when I turn on my car it was
off my question is. Is there still something wrong or not
since the light is off
You did clear the light when you unplugged the battery, but didn't fix the problem that's setting the code off. The light will come back if you don't fix it. P0420...you just have an O2 sensor that needs replacing...fairly common. However, if this is the sensor behind the catalytic converter, even if it's bad you shouldn't have any driveability issues, even with the light on. But if you have to have your vehicle inspected for emissions, you better replace it or you will certainly fail.
I figure it didn't say which o2 it was but I think might be the one after catalytic converter
Also so if the light doesn't come on it mean it fine right
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