Question

My 2001 GMC Yukon 5.3L has problems with the EVAP system monitor and secondary air. The only code I can see is B0265. How can I fix this to get it to pass for smog cert.?

Answer 1

B0265 this is for the ABS system , which does not affect the emission test, To set the monitor for the EVAP system you would need more than 1/4 tank fuel and less than 3/4. Having the fuel tank less than 1/4 and more than 3/4 the EVAP monitor will not run. For the secondary air . you need to have a cold start up.This is when the air pump turns on.

Answer 2

B0265 GMC Code - Air Flow Control 6 Circuit Low
Read more: https://www.autocodes.com/b0265_gmc.html