changed belt,got scan code POO1O

[yaris9876]

I see a solenoid next to the stud that you use to pry the alternator bracket tight..it doesnt seem damaged at all
...after I changed the belt I did start it up without the harness plugged in there.. when I saw this I quickly
plugged it in. It is tight and secure.... These computer controlled cars are suppose to adjust the timing automatically to some degree.. It seems to be a bit better than the initial roughness..but still not really
smooth... the exhaust is not smooth. It runs ok... its not bad enough to not run and when under power its smooth enough.
That solenoid doesnt seem to move at all... does it pull out..??? the scan gauge would say if it was a bad solenoid anyway.... the code is for advanced timing.....
by the way ... can you or cant you buy an obd port machine that CAN make adjustments to some degree on these Toyotas..?? mechanics..??
If not, how can someone adjust the timing manually..??? there must be a way..