How about the crank position sensor they cause variations of the way an engine will run while it's running. Temperature changes effect the windings inside it.

You said you checked sensors on the left side of the engine which makes a lot of sense to do.
The CPS is behind the engines head and in the tight spot in front of the firewall.

It there is a frayed sheath it is a clue to how old it is.
Clean the connector pins and use some dielectric paste. If the problem is better or worse buy a new CPS.

Edit: How does it drive?
The ECU codes point in two directions but vehicle speed is a speedometer related issue that affects idle.
The AMM code could be a pin hole air leak in the accordion hose behind it.

Phil