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

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.
RepairPal Verified
Average mileage: 209,500 (152,000–283,000)
5 model years affected: 1995, 1996, 1997, 2000, more2002
11 people reported this problem
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Viewing 1 - 4 of 4 problem details
Automatic Transmission May Not Shift Correctly at High Mileages Verified 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.
1997 Toyota Avalon 283,000 mi,
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
2000 Toyota Avalon 238,000 mi,
JUST CHECK ENGINE LIGHT ON, SHIFTING OK CODE PO773
1996 Toyota Avalon 152,000 mi,
P0773 Not solve yet