AutoCodes – Subaru – P1521 Subaru

P1521 Subaru Code - Brake Switch Circuit Range

Quick Answer

P1521 Subaru indicates Brake Switch Circuit Range. Common causes include Faulty Brake Switch, Brake Switch harness is open or shorted, Brake 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: P1521 Subaru indicates Brake Switch Circuit Range.
Common causes: Common causes include Faulty Brake Switch, Brake Switch harness is open or shorted, Brake 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 10,584

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 P1521 Subaru Description

OBDII Code P1521 Subaru - Brake Switch Circuit Range - AutoCodes.com — P1521 Subaru Code - Brake Switch Circuit Range

What does this mean?

What are the Possible Causes of the DTC P1521 Subaru?

Faulty Brake Switch
Brake Switch harness is open or shorted
Brake Switch circuit poor electrical connection

How to Fix the DTC P1521 Subaru?

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 P1521 Subaru 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 P1521 Subaru code?

Need more information on how to fix the P1521 Subaru 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 P1521 Subaru Code

1. What are the common symptoms of OBDII code P1521 in a Subaru related to the Brake Switch Circuit Range?

- Common symptoms include the brake lights staying on all the time, difficulty shifting out of park, and the cruise control not working properly.

2. What are the possible causes of OBDII code P1521 in a Subaru indicating an issue with the Brake Switch Circuit Range?

- Possible causes include a faulty brake light switch, a misadjusted brake light switch, damaged wiring or connectors in the brake light circuit, or a problem with the brake control module.

3. How can I diagnose OBDII code P1521 in a Subaru related to the Brake Switch Circuit Range?

- Diagnosis involves checking the brake lights to see if they are staying on, testing the brake light switch for proper operation, inspecting the wiring and connectors for damage, and using a scan tool to read the fault code.

4. Can I still drive my Subaru with OBDII code P1521 indicating an issue with the Brake Switch Circuit Range?

- It is not recommended to drive your Subaru with this code present, as it can affect the proper operation of the brake lights and potentially lead to safety issues on the road.

5. How can I repair OBDII code P1521 in a Subaru related to the Brake Switch Circuit Range?

- Repair options include replacing the brake light switch if it is faulty, adjusting the switch if it is misaligned, repairing any damaged wiring or connectors, or seeking assistance from a professional mechanic for further diagnosis and repair.

6. Is OBDII code P1521 in a Subaru a serious issue?

- While it may not directly affect the drivability of the vehicle, it is important to address this code promptly to ensure the proper functioning of the brake lights and other related systems.

7. Can a DIY enthusiast fix OBDII code P1521 in a Subaru by themselves?

- Depending on the cause of the code, DIY enthusiasts with automotive repair experience may be able to address the issue by replacing the brake light switch or making necessary adjustments. However, more complex problems may require professional assistance.

8. How long does it typically take to repair OBDII code P1521 indicating an issue with the Brake Switch Circuit Range in a Subaru?

- The repair time can vary based on the exact cause of the code and the expertise of the person performing the repair. Simple fixes like replacing the brake light switch can usually be done within an hour.

9. Are there any preventive measures to avoid OBDII code P1521 related to the Brake Switch Circuit Range in a Subaru?

- Regularly checking the operation of your brake lights, ensuring the brake light switch is properly adjusted, and keeping an eye out for any signs of wiring damage can help prevent issues that may trigger this code.

10. Can a Subaru dealership help with diagnosing and repairing OBDII code P1521 indicating an issue with the Brake Switch Circuit Range?

- Yes, Subaru dealerships have trained technicians and specialized equipment to diagnose and repair OBDII codes like P1521. If you're unsure about tackling the issue yourself, seeking professional help from a dealership is a good option.