P0773 code toyoto avolon 2002 - 1999 Lexus ES 300

P0500 OBD II Trouble Code P0770 Toyota Shift Solenoid Malfunction P0773 Toyota Shift Solenoid Electrical Malfunction

code p0773 refers to shift solenoid(SS) E --electrical===causes--wiring--shift solenoid---ECM---TCM
check wiring to the transmission for faulty connections.

Well the solenoid is inside the transmission. So someone will need to pull the pan and check the solenoid and circuit.

which is it?
Problem with 2003 Honda CR-V Ignition housing toyoto tundra 2002

P0773 Shift Solenoid E Electrical

P0773 TOYOTA - Shift Solenoid E Electrical Malfunctionhttp://engine-codes.com/p0773_toyota.htmlForum CodePossible causes- Faulty shift solenoid E valve
- Shift solenoid E valve harness or connectors
- Shift solenoid E valve circuit is open or shorted
- Low transmission fluid level
- Dirty transmission fluid

P0773 TOYOTA - Shift Solenoid E Electrical Malfunction

Possible causes- Faulty shift solenoid E valve
- Shift solenoid E valve harness or connectors
- Shift solenoid E valve circuit is open or shorted
- Low transmission fluid level
- Dirty transmission fluid (common cause of code)

You seem to be experiencing a shift lock solenoid problem inside the transmission. Possible causes are bad solenoid where you have to test the solenoid any way. Remove the trans pan and you should see the solenoid with a red wire attached. This sometimes gets pinched against the bracket inside the trans and grounds out. It could also be the wiring to the ECM or replacement ECM with updated one. Check production date, VIN break point and replace ECM if it is not the latest P/N of 89661-08061 with Denso P/N TN175200-7491.

The computer controlled shift solenoids are mounted on the hydraulic control valve body of the transmission, this in turn is located inside the transmission.

I looked up the codes you posted.
P0420 is showing a bad oxygen sensor on bank #1, the one down by the catalytic converter.
P0773 is an electrical problem with the shift solenoid E.
A bad oxygen sensor would cause lower fuel milage.