What is the product name I need to buy to fix it ?

Question

2001 Toyota Camry ; engine check light code p0420 Catalyst System (Threshold Bank 1)

Answer 1

depends what the exact problem is, you will need to get it check out by a mechanic but in may cases P0420 is for a bad catalytic converter there are two of them so it will need to be checked out

it can be very expensive $800 to $1500 for OEM parts there might be aftermarket but they dont last as long as oem