Hi all, I have a 2015 Honda Civic Si. I noticed my power would be pretty low when ac is running and the car has been on for a while. No lurching, but like a hesitation in low rpms and not the power I'm used to.

Recently, the engine light came on with error P0328. Power is now lowered regardless of the AC being on. Has anyone tried this for this error? I only run 93 octane, and I'm pretty religious on servicing my car. Bone stock, no tune, 55k miles on the clock.

I replaced the Knock Sensor with one from O'Reiley's, refilled the gas, and put Lucas Fuel Stabilizer into the tank. The car does have more power now, (no CEL) but the code still comes back even after clearing it (I use a BlueDriver). 

Any help would be greatly appreciated. If this helps, I'm also having an 85-01 VSA Signal Failure code.