2005 Dodge Dakota V6 Automatic 2-Wheel Drive Tow/Haul Issue: P0300 and P0004 Codes Explained

I'm seeking help with a recurring issue on my 2005 Dodge Dakota (37,998 miles) that has been extremely intermittent. The problem occurs randomly—sometimes after 2-3 weeks of no issues, other times within days. While driving, especially uphill or on downhills, the engine begins to choke and lose power, sometimes shaking violently as if it's about to stall. The Check Engine light flashes for 2–5 seconds before turning off, after which the vehicle runs normally. I've also experienced instances where the engine seems to misfire severely. I’ve already taken the vehicle to my dealership, where they were unable to retrieve any fault codes during or immediately after the event. We’ve performed fuel injector cleaning, head gasket replacement, and fuel pump replacement—none of which resolved the issue. The only two diagnostic codes I've captured are P0300 (engine misfire) and P0004. I'm unsure what the P000-4 code specifically means, as my dealership has not been able to identify it. Does anyone know what P0004 refers to in this context? Could this be related to a fuel system issue or sensor malfunction? Has anyone else experienced similar symptoms with their 2005 Dodge Dakota V6 automatic 2-wheel drive tow/haul vehicle? I'm still under extended warranty and would like to resolve the issue before coverage expires. Any insights into potential causes, diagnostic steps, or known fixes would be greatly appreciated. Thank you in advance for your help.