OBD 2 codes P0172 and P0175.

[Lalp01]

Long story short. I had to change my 3.8 L engine this year for a catastrophic failure of the original one. Ever since swapping the engine, the engine light is on. The OBD 2 reader reads P0172 and P0175. I have changed the air temp sensor, MAP, coolant sensor, Spark plegs, injectors, oxigen sensors, charcoal canister, purge valve,evap module attached to the charcoal canister. Can the problem be arising from the fuel pump itself? Someone mentioned the pressure regulator. Thank you for the input. Keep on Jeeping.

 

[jeeeep]

both those codes have this in common:
"look for broken, bent, pushed out, or corroded connector pins."

 

[1tmjpr]

I had P0172 P0171, and P0174 for months. Kept taking rig in and parts changer (mechanic) would blame my aftermarket intake. So after useless trips to dealership. I decided to figure it out myself. It was a wire under connector that just broke off no one's fault. The other looked cut just touching to make connection i say that is parts changers fault. Had to order connector myself, but dealership installed connectors for me.