P1520 Stop Lamp Switch Signal Malfunction
What does P1520 mean on a Toyota?
P1520. Stop Lamp Switch Signal Malfunction. This Toyota-enhanced code applies to Camry, Corolla, RAV4, Tacoma.
Common causes of P1520
- Failed stop lamp switch
- Burned-out stop lamps breaking the sense
- Open switch circuit
- Misadjusted switch
- Blown stop fuse
How to fix P1520
- Check all stop lamps including the high-mount
- Test switch continuity
- Verify switch adjustment
- Inspect the fuse and circuit
- Replace bulbs or switch per findings
Sources and review
- Last updated 2026-09-06.