AutoCodes – Toyota – P1520 2002 Toyota Echo

P1520 2002 Toyota Echo Code - Stop Light Switch Signal Malfunction

Quick Answer

This signal is used to detect when the brakes have been applied. Common causes include Faulty Stop Light Switch, Stop Light Switch harness is open or shorted, Stop Light Switch circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1520 2002 Toyota Echo indicates Stop Light Switch Signal Malfunction.
Common causes: Common causes include Faulty Stop Light Switch, Stop Light Switch harness is open or shorted, Stop Light Switch circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,387

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 27, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1520 2002 Toyota Echo Description

This signal is used to detect when the brakes have been applied. The STP signal voltage is the same as the voltage supplied to the stop lights. The STP signal is used mainly to control the fuel cut–off engine speed (The fuel cut–off engine speed is reduced slightly when the vehicle is braking).

OBDII Code P1520 2002 Toyota Echo - Stop Light Switch Signal Malfunction - AutoCodes.com — P1520 2002 Toyota Echo Code - Stop Light Switch Signal Malfunction

What does this mean?

What are the Possible Causes of the DTC P1520 2002 Toyota Echo?

Faulty Stop Light Switch
Stop Light Switch harness is open or shorted
Stop Light Switch circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P1520 2002 Toyota Echo?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1520 2002 Toyota Echo code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1520 2002 Toyota Echo code?

Need more information on how to fix the P1520 2002 Toyota Echo code? Get Access to Factory Service Manuals

Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1520 2002 Toyota Echo Code

1. What are the common symptoms of OBDII code P1520 on a 2002 Toyota Echo?

- Common symptoms include the Check Engine Light being illuminated, difficulty shifting gears, and the inability to start the vehicle.

2. What does the OBDII code P1520 for a 2002 Toyota Echo indicate?

- This code indicates a Stop Light Switch Signal Malfunction, which means that the signal from the brake light switch is not being properly received by the engine control module.

3. What are the possible causes of OBDII code P1520 on a 2002 Toyota Echo?

- Possible causes include a faulty stop light switch, damaged wiring or connectors related to the switch, or a malfunctioning engine control module.

4. How can I diagnose the cause of OBDII code P1520 on my 2002 Toyota Echo?

- You can start by checking the stop light switch for proper operation, inspecting the wiring and connectors for any damage, and using an OBDII scanner to clear the code and see if it returns.

5. Can I still drive my 2002 Toyota Echo with OBDII code P1520?

- It is not recommended to drive the vehicle with this code present, as it can affect the proper operation of the transmission and other systems.

6. How do I repair OBDII code P1520 on a 2002 Toyota Echo?

- The most common repair is to replace the faulty stop light switch, which is a relatively simple and inexpensive fix. Ensure proper installation and testing after replacement.

7. Are there any DIY tips for fixing OBDII code P1520 on a 2002 Toyota Echo?

- DIY enthusiasts can follow online tutorials for replacing the stop light switch, ensuring to disconnect the battery before starting any work and verifying the switch's proper alignment.

8. Can a faulty brake light bulb cause OBDII code P1520 on a 2002 Toyota Echo?

- While a faulty brake light bulb itself may not trigger the code, it's still a good idea to check and replace any burned-out bulbs as part of routine maintenance.

9. How long does it take to repair OBDII code P1520 on a 2002 Toyota Echo?

- The repair time can vary depending on your experience level, but replacing the stop light switch usually takes about 30 minutes to an hour.

10. Will OBDII code P1520 clear on its own after the issue is fixed on a 2002 Toyota Echo?

- Once the underlying issue is fixed and the vehicle is driven for a while without any further problems, the Check Engine Light may reset on its own after a few successful drive cycles.