My Nissan 350z is throwing a p0420 code and it starts if I let it sit and cool down then starts right up. But if I shut it off it doesn't start again until cooled down. Mods on the car are cold air intake and exhaust.
My car has 143676 miles.
My car has a manual transmission.
Hi There, Code P0420 relates to the exhaust system, specifically to the catalytic converter, however there are a number of other things that may cause this code to be triggered as well. Other things like a faulty oxygen sensor, a faulty engine temperature sensor, an exhaust leak, a leaking fuel injector or a misfire can also cause this code to come up. I would suggest having a professional from YourMechanic come to your location to take a look at your vehicle to further diagnose and repair.
Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing