Car losing acceleration when accelerating too fast or going uphill?

The oil pressure issue might cause this problem. Can you tell me what the codes number is? This guide can help:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Also, the low power can be caused by a catalytic converter that is fallen apart internally. Also, it could be the pressure fuel pump is going out as well. I would use a rubber mallet at tap the exhaust system to see if you can hear anything rattling around inside. If so, the cats have gone bad.

Here is a guide to help you check the fuel pump pressure. You can rent a gauge set at the auto parts store for cheap,

The correct fuel pressure for this vehicle is 58 psi +/- 2 psi.

Check out the images (below). Please upload pictures or videos in your response to any problems so we can see what to help you with.

The code P06DD indicates a "Dual Stage Oil Pump Stuck Low" condition. So, this code will limit power from the engine, the oil pump can vary pressure and it is stuck on low. This means the pump pickup is clogged are the oil pump control solenoid needs to be replaced.
Here is how the job is done, please check out the images below

Disconnect and isolate the negative battery cable.
Remove the upper oil pan (Refer to 09 - Engine/Lubrication/PAN, Oil - Removal).
Remove the oil pump pick-up (1) (Refer to 09 - Engine/Lubrication/PICK-UP, Oil Pump - Removal).

Disconnect the engine wire harness from the oil pump solenoid wire harness connector (1).

Press the connector retention lock tab (1) to disengage the oil pump solenoid wire harness connector from the engine block.

NOTE:
Graphic shows the engine timing cover removed for clarity.

Push the oil pump solenoid electrical connector into the engine block, rotate the connector slightly CW, push it past the primary chain tensioner mounting bolt (1) and into the engine.

Push back the oil pump chain tensioner (2) and insert a suitable retaining pin (1) such as a 3 mm Allen wrench.

CAUTION:
Always reinstall timing chains so that they maintain the same direction of rotation. Inverting a previously run chain on a previously run sprocket will result in excessive wear to both the chain and sprocket.

Mark the direction of rotation on the oil pump chain (3) and sprocket (4) using a paint pen or equivalent to aid in reassembly.
NOTE:
There are no timing marks on the oil pump gear or chain. Timing of the oil pump is not required.

Remove the oil pump sprocket T45 retaining bolt (2) and remove the oil pump sprocket (4).

Remove the retaining pin (3) and disengage the oil pump chain tensioner spring (1) from the dowel pin (2).

Remove the oil pump chain tensioner from the oil pump.

Remove the four oil pump bolts (1) and remove the oil pump (3).

Check out the images (below). Please upload pictures or videos in your response to any problems so we can see what to help you with.