Cal117

First off thanks for taking the time to read this. Ill try and keep it short.
2006 honda piolt 2wd

took to autozone for free diagnosis---
Misfires qll 6 cylinders, nothing about vtech.

what i did to fix it---
replaced all 6 spark plugs. Took out of hobby shop, running fine. Check engine light off ECO came on running good for a couple miles. Then it started acting up again.

symptoms------
check engine light on, maintenance light on. Then it idles rough, VSA and caution light come on, will increase in rpms when i hit the gas but wont accelerate, unless is turn it off and turn it on. Idles more rough when slowong down or stopping.

Diagnoais---
took a computer to it at the hobby shop. Eror code 2642, vtech solenoid. But theres 3 different ones. Theres a vtech solenoid, a variable valve timing solenoid, and another 80$ part.

I dont know which one to get.

Any help on that would be appreciated as i dont wanna have to spwnd 150 to go to the honda dealership and have them tell me its a 500$ part when some helpfull soul on here could. Thanks again!!!