P0770/P0773 fault code at higher mileage due to failed 3-way lock-up solenoid on Toyota Tercel

Problem Description and Possible Solution
A code P0770 or P0773 may occur at higher mileages which indicates that the 3-way lock-up solenoid could be defective and may need replacement.
Problem Data
RepairPal Verified
Average mileage: (–)
5 model years affected: 1995, 1996, 1997, 1998, more1999
5 people reported this problem