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

Problem Description and Possible Solution

A transmission fault code of P0770 or P0773 may occur at higher mileages which indicates that the 3-way lock-up solenoid has failed and will need replacement.

Problem Data
RepairPal Verified
Average mileage: 176,666 (140,000–230,000)
Drive Train affected: Automatic Transmission
4 model years affected: 1995, 1996, 1997, 2006
8 people reported this problem
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I have a Toyota solara with a missing 2nd gear. I don't know how to fix it. Help.