Question

2003 Toyota Camry LE 2.4L with engine code p0420, what is the best solution?

Answer 1

This is a code for the catalytic converter. Most often the converteris required to resolve the code, but sometimes an exhaust leak will also cause it.

Answer 2

P0420 TOYOTA - Catalyst System Efficiency Below Threshold Bank 1
Read more: https://www.autocodes.com/p0420_toyota.html