Can I Drive With a P0420 Code on the Highway? What This Code Actually Means

Can I Drive With a P0420 Code on the Highway

P0420 is one of the most searched OBD-II codes because it sounds alarming: catalytic converter below efficiency threshold. But unlike a flashing check engine light or a low-oil-pressure warning, P0420 by itself is not an immediate emergency. Most drivers with a P0420 can drive normally, including on the highway, for days to weeks without causing […]