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Kevin, Auto Mechanic
Category: Honda
Satisfied Customers: 1361
Experience:  Diagnostic technician
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Honda crv 2001 code read p0420 id like to know if i should

Customer Question

Honda crv 2001 code read p0420 id like to know if i should replace the catalytic converter first or the oxygen censor
Submitted: 1 month ago.
Category: Honda
Expert:  Kevin replied 1 month ago.

9/10 this is down to the cat the only way to know for sure is to view the live data on diagnostic tool and analyse rear lambda operation .but more likely tobe the catalytic converter at fault

Customer: replied 1 month ago.
I had it checked at the autozone, so where can i go to read the live data?
Expert:  Kevin replied 1 month ago.

Anywhere with a scanner showing voltage for lanmbda bank 1 sensor 1 and bank 1 sensor 2 .bank 1 sensor 1 voltage shold fluctuate batween o and around 1 volts and the bank 1 sensor 2 should be static around 0.7 volts . If sensor two is moving then catalytic converter will need replacement

Expert:  Kevin replied 1 month ago.

Please rate my service and let me know if you need anything else at all