Lalp01
New member
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.