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Q: Code PO770 on 2000 Toyota Corolla

The malfunction indicator light came on while driving, had a diagnostic check which came up with code PO770, what does this mean. After the text the light went out. I have no apparent problems and the car is driving ok, the car has done 174k miles
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Automatic Transmission problem.

P0770 Shift Solenoid 'E' (SL) Malfunction (Mechanical) - With Automatic TransmissionPossible Causes Setting Conditions
•A/T component problems (i.e., in clutch, brake or gears)
•SL (shift lockup) is damaged, stuck "open" or stuck "closed"
•Transmission valve body is clogged, dirty or stuck
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