If the selector lever will not move from P using the proper shift procedure, continue to hold down the brake pedal.

Take the vehicle to an Authorized Mazda Dealer to have the system checked.
Shift-Lock System
Manual Shift ModePCM Inspection [Mzr 2.0, Mzr 2.5]
Using M-MDS
NOTE:
PIDs for the following parts are not available on this model. Go to the appropriate
part inspection page.
CMP sensor
Main relay
1. Connect the M-MDS to the DLC-2.
2. Switch the ignition to ON.
3. Measure the PID value.
...
Judder Upon Torque Converter Clutch (TCC) Operation [Fw6 A EL]
TROUBLESHOOTING ITEM
Judder upon torque converter clutch (TCC) operation
DESCRIPTION
Vehicle jolts when TCC is engaged.
POSSIBLE CAUSE
Signal malfunction
APP ...
Transaxle Oil Inspection [G35 M R]
1. Park the vehicle on level ground.
2. Remove the aerodynamic under cover No.2..
3. Remove the oil level plug and washer.
4. Verify that the oil is near the brim of the plug port.
If the oil level is lower than the low level, add the specified amount and
type of oil through the ...