DTC P0731-P0734: Incorrect Gear Ratio (No 1ST, 2ND, 3RD Or 4TH Gear), DTC P0750 & P0751: Shift Solenoid No. 1 Malfunction Or DTC P0755 & P0756: Shift Solenoid No. 2 Malfunction: Description
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.
DTCs P0731-P0734 are set when PCM detects (after 2 drive cycles) an RPM difference between turbine shaft speed and output shaft speed that is outside programmed limits. DTCs P0750 and P0751 are set when PCM detects (after 2 drive cycles) an open or short circuit for shift solenoid No. 1. DTCs P0755 and P0756 are set when PCM detects (after 2 drive cycles) an open or short circuit for shift solenoid No. 2.
Transaxle will operate in different gear as a result of malfunctioning component or circuit. See Figure-Figure .