My wife’s Cherokee has p0420 error. The car is a 2016 with 55k miles on it. The error suggests it’s a catalytic converter error. My best hunch is it’s an sensor. Sensors aren’t covered anymore under the warranty but the cat is.
Is my best bet to contact the dealer and report the code? If it’s the car than they will fix under warranty right? If it’s the sensor then they wouldn’t … but i imagine the cost to fix the sensor at the dealer wouldn’t be that much more than a small garage.