What does code P1780 mean on Toyota vehicles?
The ECU detects a malfunction in the park/neutral position (PNP) switch circuit, preventing correct gear position recognition.
OBD-II Code Toyota
P1780 — Toyota — Park/Neutral Position Switch Malfunction (A/T Only)
The ECU detects a malfunction in the park/neutral position (PNP) switch circuit, preventing correct gear position recognition.
Common symptoms
- No start condition
- shift interlock issues
- incorrect gear indication
Possible causes
- Faulty PNP switch
- misadjusted switch
- wiring or connector issues
Initial recommendation
Test and adjust the PNP switch, inspect wiring and connectors.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
Use the app to combine Toyota code P1780 with your vehicle's actual symptoms for more complete diagnostic guidance.
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