Toyota Avalon Problems

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

Problem Description and Possible Solution

A code P0770 or P0773 may occur at higher mileages which indicates that the 3-way lock-up solenoid is defective and will need replacement.
(12 people reported this problem)

Toyota Avalon Vehicles With This Problem

RepairPal Verified
Average mileage: 209,500 (152,000–283,000)
5 model years affected: 1995, 1996, 1997, 2000, more2002
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Automatic Transmission May Not Shift Correctly at High Mileages


At higher mileages, (125,000-150,000) theautomatic transmission may not shift correctly. This can be caused by the throttle position sensor being out of adjustment or ashift solenoid needing to be replaced. Typically the transmission does not need to be completely overhauled.
check engine light kept coming on. I ran the code came back as po773. then my transmission whent out as i was on my way to the mechanic to get the problem fixed so i replaced my transmission