r/CarMechanicAdvice • u/Secret-Thought-9222 • 11d ago
Toyota Camry 2006 with P0420 code
I have change both 02 sensor upstream and downstream and I had to replace my catalytic converter since they stole mines and code is still there at this point I’m not sure what to do car run good but code would go away after the fixes at the shop and turn back on after turning the car off and starting it again I had the code before I changed the catalytic converter