What does code P1520 mean on Toyota vehicles?
The ECU detects an incorrect or missing signal from the brake (stop lamp) switch.
OBD-II Code Toyota
P1520 — Toyota — Stop Lamp Switch Signal Malfunction
The ECU detects an incorrect or missing signal from the brake (stop lamp) switch.
Common symptoms
- Brake lights malfunction
- shift lock issues
- cruise control inoperative
Possible causes
- Brake light switch failure
- misadjusted switch
- wiring fault
Initial recommendation
Test brake light switch operation and adjust or replace if necessary.
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 P1520 with your vehicle's actual symptoms for more complete diagnostic guidance.
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