Stop the car and turn it off and don't forget to remove the key. the open the hood and find the battery. Then remove the negative battery terminal connector completely from the battery. with the battery disconnected turn on you headlamps as you would for night time driving. Wait an half an hour so all the current drains out the the electrical system. after the half hour TURN OFF THE HEADLAMPS BEFORE RECONNECTING THE BATTERY! Next reconnect the negative battery terminal connector back on the negative battery terminal don't forget to tighten it down. Put the key in the ignition turn the computer on to on BUT wait 5 seconds before actually starting the car, then start the car as normal and drive the car at least 25 miles 10 city 15 highway so the car can relearn all it functions again **Note first time start the car my be rough due that it need to relearn if it is acting rough apron start up let it idle for a bit before driving so it can calm down**
SOURCE: check engine light on;engine codes p0420 and p0773
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.
SOURCE: vsc vsc off check engine
Disconnect your battery for 10 minutes after which you connect it back the lights should go off. Don't report to toyota. Nigerian style!
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SOURCE: how do I reset engine light
disconnect the battery for 5 minutes or use a scan tool, the scan tool is prefered method.
SOURCE: vsc vsc off check engine
I just had the same issue. Cost me $40.00 to find out my gas cap wasnt clicked all the way. He also said that after the error arises, simply closing the gas until it clicked may not have removed the error code from the computer. Not sure how, but you might have to reset the computer, maybe just pull the battery?
Sean
SOURCE: check engine with vsc & vsc off light came on
Autozone will check your engine codes for free.
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