answersLogoWhite

0


Best Answer

P0420 = Catalyst System Efficiency Below Threshold Bank 1.Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic converter needs to be replaced to fix the problem. If the P0420 code is combined with other codes, try fixing the other codes first.




User Avatar

Wiki User

6y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: What does P0420 on a Lexus ES330 means?
Write your answer...
Submit
Still have questions?
magnify glass
imp