Faulty Transmission Control Module (TCM)
TCM harness is open or shorted
TCM circuit poor electrical connection
Engine Light ON (or Service Engine Soon Warning Light)
Automatic Transmission Lock-Up Clutch Malfunction is the generic description for the P1787 Acura code, but the manufacturer may have a different description for your model and year vehicle. Currently, we have no further information
about the P1787 Acura OBDII code.