My explorer is throwing several different codes will not crank

Hi, this is Bo, an auto expert on RepairPal's Car Genius team! It sounds like your 2003 Explorer is experiencing a classic case of electrical gremlins. The codes you’re seeing can point to a range of issues, but the fact that the vehicle shut down while driving is a key clue. Codes like U1262 and U1073 are related to communication problems within the vehicle's control modules, which might indicate a fault in the wiring or connectors. The B1360 could point to an issue with the battery or a related electrical circuit, and B1 2 0 1 1 2 3 could be a specific configuration or programming error. The beeping you hear when turning the key suggests there might be a security system issue, especially since you had to get new keys made and have the computer flashed. The system might not recognize the key or could have a fault. Start by checking the battery connections and grounds; a loose or corroded connection could create a host of problems. If the battery and connections are solid, a deeper dive into the wiring or a full scan of the vehicle’s modules may be necessary. If you need any further advice or want help finding a trusted RepairPal shop in your area, please feel free to call us at 877-913-1554.