ECON and PWR light troubleshooting

[magpie]

Hey!

So I made a post a little while ago stating I had some issues after winter storage, with the econ/pwr lights being one of them. Long story short the pwr light stays on when the car is idling, and it never goes back to econ.

I've checked all the vacuum lines for the TVIS switch, they all seem fine. I tried wiggling the connector plug aswell to make sure it's snug.

My concern is that the battery died out during winter so I had to get a new battery. Could it be some electronics was fried when I connected the new battery? Considering all vacuum lines and connections seem fine, could the problem be somewhere in the ECU?

Is there something I've overlooked here?