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P1780 Diagnostic Trouble Code Discussion for March 2008

Park/Neutral Position Switch Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1780
Help Request Posted
2000 Saturn LW2 3.0L MIL Lamp on VIN: 1G8JW82ROY
P1780: Torque Reduction Request Failed. came in for no ac---scanned--found 5.1 volts on ac pressure indicating ecm shut ac off for hi pressure problem. Check all three wires at pressure sensor and found 5 volts on black wire to ecm. Grounded wire--ac works. originally had 10 codes, mostly, I believe...
March 24, 2008