Possible causes – Faulty Park/Neutral Position (PNP) switch– Park/Neutral Position (PNP) switch harness is open or shorted– Park/Neutral Position (PNP) switch circuit poor electrical connection– Misadjusted Park/Neutral Position (PNP) switch Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1780 TOYOTA OBD Code Description The Park/Neutral Position (PNP) switch detects the shift lever…