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P1780 Diagnostic Trouble Code Discussion for August 2004

Park/Neutral Position Switch Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1780
Help Request Posted
1997 Geo Prizm LSi 1.8L MIL Lamp on VIN: 1Y1SK5283V
P1780: Park Neutral Position Switch Circuit Malfunction. found code 1780 comes back every time vehicle is placed from park to any gear and back. new switch has same thing. found 12 volts on pcm connector pins for reverse, low, and 2nd gear, but not for park or neutral.also new wire from switch to pcm, has same probl...
August 19, 2004