I have a 2001 chevy p/u 5.3L i am pulling multiple codes P0420 and P1415 has anyone had this issue? and if so what did you do to fix it? i am not sure where to start and it gets expensive quick any help would be greatly apprieciated

 

p0402 - catalyst system efficiency below threshold, bank 1....O2 sensor?
P1415 - Air pump...
Emisions related. 1415 is the cause for 0402. I don't know how to fix it. I found the info with a google search.

 

cool thanks well hopefully the O2 sensor will fix that problem do you think i should change all of them?


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