answersLogoWhite

0

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

7y ago

Still curious? Ask our experts.

Chat with our AI personalities

JordanJordan
Looking for a career mentor? I've seen my fair share of shake-ups.
Chat with Jordan
SteveSteve
Knowledge is a journey, you know? We'll get there.
Chat with Steve
ReneRene
Change my mind. I dare you.
Chat with Rene

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