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Q: how do i run car through drive cycle in order to pass emissions test ?
on 1999 Oldsmobile Silhouette

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Not supported for : Heated Cat, Air system, air conditioner
nor ready- heated 02
(1) Answer
(2) Comments
Not supported means that component doesn't apply to your vehicle. Heated O2- Try driving at steady speed (cruise control) on highway for 10 miles or so , and then coast downs (not braking) as much as safe in driving conditions. Each manufacturer has their own rec. , but that routine has worked pretty well for me on most. BE PATIENT , all cars react differently and individual driving styles can have a big effect on setting the readiness codes.