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thebesthonda, ASE MasterTechnician
Category: Acura
Satisfied Customers: 783
Experience:  26 years experience
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My 2005 TL failed P0420 code, it is P0420, I have not tried

Customer Question

my 2005 TL failed P0420 code
JA: Just to clarify, what's the exact code? And have you tried to reset it?
Customer: it is P0420
JA: Are you fixing your TL yourself? What have you tried so far?
Customer: I have not tried anything, can you give me a hint?
JA: Anything else you want the mechanic to know before I connect you?
Customer: No, that so I have
Submitted: 2 months ago.
Category: Acura
Expert:  Kalamykid replied 2 months ago.

This code is for the o2 sensor. It has detected that the cat is not working to spec. This can be caused be a bad down stream o2 sensor, bad catalytic converter, a vacuum leak, or You are running to rich. Where there any other codes set? How does the car drive?