Code P2106 and P2173 driving and engine stalls

After about 30 min (give or take), and sometimes a heavy rocking of the vehicle from side to side, it will start again but feels like it lacks power.."

Battery & alternator have been replaced twice.

Could it be a clogged fuel filter?

Filled the fuel tank when tanker was unloading at station. The vehicle appears to have run out of fuel. After being towed home car started up and ran for 4 days before same thing happened.
Could my filter be clogged? Where is it located? Web says on the firewall drivers side AND another says in the fuel tank. Or could it be the fuel pump working intermitant?

Hi,
Problem is I have a Kia Sedona 2004 it runs great but 1 1/2 months ago I had to replace the fuel pump the car ran great. 3 weeks later at one finger nail above empty the van shut down I pulled to side of road. Some one suggested I might be out of gas So I put gas in and it started I then filled the tank. About 2 weeks later at one finger nail above 1/3 of the tank full the van shut down I pulled to side of road I then put gas in it started right up but the tank did have the gas in it but once more I filled it up one week ago the same thing but at one finger nail above 1/2 I filled it up but I could only get 4 gal in Saturday September 20 the van shut down I pulled to side of road got gas started right up I could only get $20 worth gas in tank now at a full tank the same but stuck at Safeway with full tank and the meter shows a full tank but vehicle acts as if there is no gas any Ideas I will donate if its the problem

Is the Malfunction Indication Light showing and have you checked for trouble codes?
At no time did the check engine light come on the vehicle just shut down A friend did put an OEM /OBD reader ( I think that's what you call them) reader on it did not give any codes.

When engine could not be started, did you check what was missing causing the non starting?
The only thing I did was to add gas and it started right up.

Loaned my car to niece. She said she was driving down road car quit running as all lights including engine lift lit up before it diedl. Towed to dealership and they said main relay switch under hood was missing. They said it was not possible to be driving along and this happening. Is this possible?

2004 Kia Sendona 2.9 manual -EWL comes on under load at 60-70 mph. Then unable to select any gear until the engine is stopped and retarted and left running for 3-5 mins