Engine code: P0651. Engine power reduced
 

I need serious help! My car started acting funny. It will sometimes go to limp mode. Then, it has very rough idle, no power at all. Now, shutting the car off and back on doesn't work, when it used to work before.

I have checked for shorts in the harness. I have cleaned a connection that had oil on it. I don't know what else to do. I'm thinking that it could be a bad ecu now.