2006 Jeep Liberty 3.7L V6 P0302 and P000-4 Codes: Diagnosis and Repair Solutions

I own a 2006 Jeep Liberty with a 3.7L V6 engine. The vehicle is currently displaying both P0302 (Cylinder 2 Misfire Detected) and P0004 (Fuel Pump Control Circuit Malfunction) diagnostic trouble codes. The original owner had the fuel injector, spark plug, and coil pack replaced at a repair shop. After the work, the technician recommended reprogramming the engine control module (ECM), but the codes persist. I've performed a compression test on cylinders 2 and 4, which show readings within 5 PSI of each other—indicating no significant mechanical issues. I also swapped spark plugs and coil packs between cylinders 2 and 4 to isolate the misfire source, but the problem remains unchanged. The P0302 code suggests a cylinder-specific issue, while P0004 points to a potential fuel system or sensor fault in the fuel pump control circuit. Any insights or troubleshooting steps for these persistent codes on this model? Is it possible that the P0004 code is related to the fuel pressure regulator or a faulty sensor rather than the fuel pump itself?