Mazda 6 Service Manual: No.9 fast idle/runs on

No.8 engine runs rough/rolling idle

No.10 low idle/stalls during deceleration

Other materials:

Mazda 6 Service Manual: Instrument cluster removal/installation
Caution When replacing the instrument cluster, the configuration procedure must be performed before removing the instrument cluster. If the configuration procedure is not performed before removing the instrument cluster, it is possible that the instrument cluster will not operate normally. ...

Mazda 6 Service Manual: Selector cable adjustment
1. Remove the center console. 2. Shift the selector lever to P position. 3. Unlock the lock piece of the selector cable (selector lever side) in the order shown in the figure. 4. Verify that the manual shaft is in P position. 5. Lock the lock piece of the selector cable (selector lever side) ...