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P1780 Diagnostic Trouble Code Discussion for July 2006

Park/Neutral Position Switch Circuit Malfunction

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Trouble Ticket Help Requests for DTC P1780
Help Request Posted
1996 Toyota T100 SR5 3.4L Hesitation, Surge, Cuts out, MIL Lamp on VIN: JT4UN24D6T
P1780: Park/Neutral Position Switch Circuit Malfunction. Hello Toyota experts, This T100 is driving me insane. It wants to shut down at 2500 RPM regardless of engine load. Almost feels like a rev limiter but never in Park or Neutral, only while driving. Fuel pressure is within specs (40 PSI). The speedometer is inop...
July 19, 2006