AutoCodes – Generic – U11BC

U11BC Code - Lost Brake Switch Message

Quick Answer

The Powertrain Control Module (PCM) receives the brake switch signal over the Controller Area Network (CAN) C bus from the Anti-Lock Brake System (ABS) Module. Common causes include Faulty Brake Pedal Position (BPP) Sensor, Brake Pedal Position Sensor harness is open or shorted, Brake Pedal Position Sensor 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: U11BC indicates Lost Brake Switch Message.
Common causes: Common causes include Faulty Brake Pedal Position (BPP) Sensor, Brake Pedal Position Sensor harness is open or shorted, Brake Pedal Position Sensor 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 11,233

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 28, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U11BC Description

The Powertrain Control Module (PCM) receives the brake switch signal over the Controller Area Network (CAN) C bus from the Anti-Lock Brake System (ABS) Module. The Diagnostic Trouble Code (DTC) sets when the PCM doesn't receive a brake switch signal from the ABS Module over the CAN C bus. One Trip fault.

OBDII Code U11BC - Lost Brake Switch Message - AutoCodes.com — U11BC Code - Lost Brake Switch Message

What does this mean?

What are the Possible Causes of the DTC U11BC?

Faulty Brake Pedal Position (BPP) Sensor
Brake Pedal Position Sensor harness is open or shorted
Brake Pedal Position Sensor circuit poor electrical connection
Faulty Anti-Lock Brake System (ABS) Module
Faulty Powertrain Control Module (PCM)

How to Fix the DTC U11BC?

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 U11BC 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 U11BC code?

Need more information on how to fix the U11BC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U11BC code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U11BC Chrysler — Lost Brake Switch Message
U11BC Dodge — Lost Brake Switch Message
U11BC Jeep — Lost Brake Switch Message
U11BC RAM — Lost Brake Switch Message

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 U11BC Code

1. What are the common symptoms of OBDII code U11BC, Lost Brake Switch Message?

The common symptoms include the illumination of the check engine light, loss of communication with the brake switch, and potential issues with the vehicle's brake system.

2. What are the possible causes of the U11BC code, Lost Brake Switch Message?

Possible causes may include a faulty brake switch, wiring issues, poor electrical connections, or a malfunctioning control module.

3. How can I diagnose the U11BC code, Lost Brake Switch Message?

Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, checking the brake switch and its wiring for any visible damage, and testing the brake switch for proper functionality.

4. Can driving with the U11BC code, Lost Brake Switch Message, pose any safety risks?

Driving with this code may result in issues with the brake system, potentially affecting brake lights and other safety features. It is recommended to address the issue promptly.

5. Is it safe to continue driving my vehicle with the U11BC code, Lost Brake Switch Message?

It is not advisable to continue driving the vehicle with this code present, as it may impact the proper functioning of the brake system and compromise safety.

6. How can I repair the U11BC code, Lost Brake Switch Message?

Repair may involve replacing the faulty brake switch, repairing any damaged wiring or connections, or reprogramming the control module to restore communication.

7. Can I reset the U11BC code, Lost Brake Switch Message, without fixing the underlying issue?

While you can clear the code with a diagnostic scanner, it is crucial to address the root cause to prevent the issue from reoccurring and ensure the proper functioning of the brake system.

8. Are there any DIY tips for fixing the U11BC code, Lost Brake Switch Message?

DIY tips may include checking and cleaning the brake switch connections, inspecting the wiring for damage, and ensuring a secure connection to the control module.

9. How much does it typically cost to repair the U11BC code, Lost Brake Switch Message?

The cost of repair can vary depending on the underlying issue, parts needed, and labor rates. It is recommended to consult with a professional mechanic for an accurate estimate.

10. Can a mechanic help me with diagnosing and repairing the U11BC code, Lost Brake Switch Message?

Yes, a qualified mechanic can diagnose the issue using specialized tools, pinpoint the cause of the code, and perform the necessary repairs to resolve the Lost Brake Switch Message error.