got this from auto zone catalyst system efficiency below threshold- bank 1 probable causes air leak in exhaust before rear h2os,af sensor error,fuel system fault,faulty catalytic converter. 1999 4 runner limited 63K any input would be appreciated

 

What's the actual OBDII code?

Sounds like a bad O2 sensor

 

how many miles u got

 

huh no codes on the slip from my wife ? the truck has 63000 on it will check back with auto zone in the am when i get home from work:0