O sorry I saw the 2025 in the year from the post. So with these codes you just need the fuel injector replaced or it is unplugged.
P0303 - Cylinder 3 Misfire Detected
P0203 - Injector Circuit/Open - Cylinder 3
The upper timing chain cover must be leaking and has nothing to do with the engine codes or how it runs, can I ask if you see oil drip on the ground where you park the car? If not I would let it go and just watch the oil level. Unless it is leaking too much then it much be fixed, sometimes a dealer will see a "seep" and call it a leak FYI.
To replace the fuel injector you must remove the fuel rail, check out the images (below). Please upload pictures or videos in your response so I can see how bad the problem is.
Images (Click to make bigger)
Sunday, July 13th, 2025 AT 12:21 PM