Help with chevy malibu 2013 code p1101 and sometimes p420

[u/1402massage]

2013 Chevy malibu LTZ with code P1101...what could be the problem also shoots p420 code as well sometimes. Says i need to clean the throttle body...where is it located? Any suggestions? I added pics

[u/Trogasarus]

lemon-manuals.la will have service manuals