Poor acceleration at any speed

The car has very poor acceleration at any speed even with the accelerator almost to the floor.
somewhat better acceleration upon downshift. The car is able to achieve highway speeds up to 80 mph and does reasonable well on hills upon downshifting. There are no indicator lights nor messages such as reduced power.
The Camshaft Position Actuator was previously replaced do to the car riding like a bucking horse at low speeds and a P0010 - "A" Camshaft Position Actuator Circuit (Bank 1) code.

My question is: could the low power be caused by the Camshaft Position Actuator not working at all or because of some other part such as the throttle valve?

If the wiring is faulty would there be a engine code?