After repair work, the engine starts but immediately sets MAP, throttle and fuel-pressure codes. Three sensors failing at the same moment is possible but unlikely. The more useful question is what those circuits share.
Check the 5 V reference. If it is missing, inspect connectors and harness sections disturbed during the repair. A pinched wire under a bracket or a connector plugged into the wrong mating half can pull the reference low. Unplugging one branch at a time can isolate the short if the wiring diagram confirms the shared circuit.
Also inspect common grounds and main harness connectors. A partially seated ECU connector can affect multiple sensor circuits. Resist the urge to clear codes repeatedly; record them and use the pattern.
Clusters of new codes immediately after mechanical work often point toward something shared or disturbed, not simultaneous independent sensor failures.