AutoCodes – Toyota – P0504 2011 Toyota Camry

P0504 2011 Toyota Camry Code - Brake Switch Circuit 'A' / 'B' Correlation

Quick Answer

The stoplight switch is a duplex system that transmits two signals: STP and ST1-. Common causes include Faulty stop lamp switch, Blown stop lamp bulb, Brake switch harness open or shorted. 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: P0504 2011 Toyota Camry indicates Brake Switch Circuit 'A' / 'B' Correlation.
Common causes: Common causes include Faulty stop lamp switch, Blown stop lamp bulb, Brake switch harness open or shorted.
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 9,910

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Basic DIY (1 / 3)

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Table of contents Created and updated by William Orellana on Jul 31, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0504 2011 Toyota Camry Description

The stoplight switch is a duplex system that transmits two signals: STP and ST1-. These two signals are used by the Engine Control Module (ECM) to monitor whether or not the brake system is working properly. If the signals, which indicate the brake pedal is being depressed and released, are detected simultaneously, the ECM interprets this as a malfunction in the stoplight switch and sets the Diagnostic Trouble Code (DTC).

OBDII Code P0504 2011 Toyota Camry - Brake Switch Circuit 'A' / 'B' Correlation - AutoCodes.com — P0504 2011 Toyota Camry Code - Brake Switch Circuit 'A' / 'B' Correlation

What does this mean?

What are the Possible Causes of the DTC P0504 2011 Toyota Camry?

Faulty stop lamp switch
Blown stop lamp bulb
Brake switch harness open or shorted
Brake switch circuit poor electrical connection
STOP fuse
IGN fuse

How to Fix the DTC P0504 2011 Toyota Camry?

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 does this mean?

Code Tech Notes

Check to see if the bulbs are good if they are good check the STOP fuse and IGN fuse, if they are good most likely the STOP light switch (near the brake pedal) is bad if there is no wiring issues.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0504 2011 Toyota Camry 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.

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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 P0504 2011 Toyota Camry Code

What does the OBDII code P0504 mean on a 2011 Toyota Camry?

P0504 indicates a Brake Switch Circuit 'A' / 'B' Correlation issue, meaning the signals from the two brake switch circuits do not match as expected.

What are the common symptoms of code P0504 in a 2011 Toyota Camry?

Symptoms may include the brake lights not functioning properly, the cruise control being disabled, or the Check Engine Light illuminating.

What causes the P0504 code in a 2011 Toyota Camry?

Common causes include a faulty brake light switch, damaged wiring or connectors in the brake switch circuit, or misaligned brake pedal components.

Can I drive my 2011 Toyota Camry with code P0504?

It is not recommended to drive with this code because it may affect crucial systems, such as brake lights and cruise control, which are important for safety.

How do I diagnose the P0504 code in my 2011 Toyota Camry?

Inspect the brake light switch and its wiring for damage, test the switch for proper operation, and check for any misalignments in the brake pedal assembly.

How do I fix code P0504 on a 2011 Toyota Camry?

Repairs may include replacing the faulty brake light switch, repairing damaged wiring, or adjusting the brake pedal to ensure proper switch engagement.

What tools are needed to troubleshoot the P0504 code?

You may need a multimeter to test the brake switch, an OBDII scanner to verify the code, and basic tools to access and replace the brake light switch.

How much does it cost to fix P0504 on a 2011 Toyota Camry?

Repair costs can vary, but replacing a brake light switch typically costs between $50 and $150, including parts and labor.

Can a dirty brake pedal sensor cause the P0504 code?

While uncommon, dirt or debris on the brake pedal or sensor area could potentially cause the switch to misalign or malfunction, triggering the code.

How can I prevent the P0504 code in the future?

Regularly inspect and maintain the brake pedal assembly, replace the brake light switch at the first sign of failure, and ensure the wiring remains intact and free of corrosion.