My check engine light is on and the codes po305 and po174 what exactly should I do?

P0174 is usually a vacuum leak. That can cause a P0305

Do tune up,coils module,wires,plugs and see what happened..

PO171 and P1131 point to lean codes on bank PO174 and P1151 point to lean code on bank PO305 is missfire on cyl 5

the lean codes is probably a vacuum leak or maybe a MAF sensor is bad or dirty

missfire is dependant on engine if a V10 it may be a coil actually pretty likely on the modulars not uncommon thats for sure
sorry forgot to add that its says missfire on #5 cant remember if that one is the first on the left or last on the left facing the engine vacummn leak could be those dang auto hubs got it stuck in the mud and they did not engage I need to buy some new ones took them apart to clean them out this summer

Did you resolve the other codes? p0300 random multiple misfire, p0305 misfire cyl #5, p0307 misfire cyl #7? You could have bad ignition coils or a vacuum leak. Check your coils and check for vacuum leaks at the intake manifold check vacuum hoses. Hope this helps!

if it is a no start check crankshaft sensor you also have a camshaft sensor

the po303 and p0305 codes are indicating a cylinder 3 & 5 MISFIRE respectively. the other codes are for o2 sensor and fuel trim. the misfire codes should be fixed first and then worry about the others if they still exist. if the vehicle has direct ignition or coil on plug, this is a good place to start, the ignition coils for those cylinders. a scanner with a misfire monitor would really help to narrow done the problem and as always a tune-up never hurts if it hasn't been done for some time or plugs, air filter, etc, show signs of deterioration. the misfire codes if left untreated will release raw hydrocarbon emissions into the environment not to mention the damage it could cause to your catalytic converter due to overheating. also your gas mileage will suffer. hope this will help yoy

Check wiring to sensors.

It's related to the "MAP sensor".

let it warm up first...cheapest way to solve the problem

Autozone can tell you