What does code P1780 mean on Lexus vehicles?
The ECU detects a malfunction in the park/neutral position (PNP) switch.
OBD-II Code Lexus
P1780 — Lexus — PNP Switch Malfunction
The ECU detects a malfunction in the park/neutral position (PNP) switch.
Common symptoms
- No start in Park or Neutral
Possible causes
- Faulty PNP switch
- wiring fault
Initial recommendation
Replace park/neutral position switch and verify adjustment.
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 Lexus code P1780 with your vehicle's actual symptoms for more complete diagnostic guidance.
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