What does the P0420 mean on a 1999 Toyota Camry?

P0420 is a generic OBD-II trouble code that indicates a problem with the catalytic converter in your 1999 Toyota Camry. The catalytic converter is a device that helps to reduce emissions from your vehicle's exhaust system, and it can become clogged or damaged over time. When this happens, the P0420 code will be set and the check engine light will come on.

There are a few things that can cause the P0420 code to be set, including:

* A faulty oxygen sensor

* A clogged catalytic converter

* Damaged exhaust components (leaks, cracks, etc.)

If you see the P0420 code on your 1999 Toyota Camry, it's important to have the problem diagnosed and repaired as soon as possible to avoid further damage to your vehicle's emissions system.