Transaxle Will Not Shift
WARNING: This page is about a different car, the 2002 Mazda 626 and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
Possible cause: burnt clutches, low ATF level, TP sensor malfunction, VSS malfunction, input/turbine speed sensor malfunction, shift solenoids sticking, pressure control solenoid system, faulty control valve body, O/D OFF system malfunction, HOLD system malfunction, poor sensor ground, poor body ground, PCM malfunction and/or PCM malfunction.