P1520 – Toyota DTC

Toyota DTC P1520 – Stop Lamp Switch Signal Malfunction

DTC P1520 meaning on Toyota

DTC P1520 on a Toyota indicates a malfunction in the stop lamp switch signal circuit. This code is set when the Engine Control Module (ECM) detects an abnormal signal from the stop lamp switch.

Toyota DTC P1520 symptoms

Symptoms of DTC P1520 in a Toyota may include:

• Malfunctioning brake lights
• Inability to shift out of park
• Check Engine Light (CEL) illuminated on the dashboard

Toyota DTC P1520 causes

Common causes of DTC P1520 in a Toyota include:

• Defective stop lamp switch
• Wiring issues in the stop lamp switch circuit
• Faulty connections in the circuit

Toyota DTC P1520 seriousness

While DTC P1520 may not directly affect the drivability of the vehicle, it is important to address this issue promptly as it can impact the safety of the vehicle by affecting the brake lights and potentially the ability to shift gears.

How to diagnose DTC P1520 on Toyota

To diagnose DTC P1520 on a Toyota, follow these steps:

1. Check the stop lamp switch for proper operation
2. Inspect the wiring and connections in the stop lamp switch circuit for any damage or corrosion
3. Use a scan tool to retrieve and analyze the diagnostic trouble code

How to fix DTC P1520 on Toyota

To fix DTC P1520 on a Toyota, you can:

1. Replace the faulty stop lamp switch
2. Repair any damaged wiring or connections in the circuit
3. Clear the trouble code from the ECM after the repair is completed

How to erase DTC P1520 on Toyota

To erase DTC P1520 on a Toyota:

1. Use a scan tool to clear the trouble code from the ECM
2. Ensure the repair has been completed successfully before clearing the code

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