OBDII Monitors not ready...
2006 Impala LT 3500 engine. 97,000 miles.
It had a code P0172 (Bank one rich) Checked front spark plugs, cleaned MAF, checked fuel pressure (60psi) It runs great. I thought I had a bad downstream oxygen sensor...it barely moved on the scanner. Changed it, and reset all codes with the scanner.
Now when I drive it to get the monitors ready, (Htr, Cat, Evap, O2) I get no responce. I know the drive cycles, but it seems to not want to budge. It does go into closed loop, and the data looks good.
I've got around 60 miles into it, after the re-set.
Could I be looking at a re-flash? Any ideas???
So far, no check engine light, ....yet...