AutoCodes – RAM – U11BC RAM

U11BC RAM 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 RAM 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 1,964

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

What does this mean?

What are the Possible Causes of the DTC U11BC RAM?

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 RAM?

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 RAM 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 RAM code?

Need more information on how to fix the U11BC RAM 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 U11BC RAM Code

1. What is the OBDII code U11BC RAM related to Lost Brake Switch Message?

The code U11BC RAM indicates that the vehicle's control module has detected a lost communication message from the brake switch.

2. What are the common symptoms of the U11BC RAM code?

Common symptoms of the U11BC RAM code include the brake lights not working properly, the cruise control system not functioning, and the vehicle possibly going into "limp mode."

3. What are the possible causes of the U11BC RAM code?

Possible causes of the U11BC RAM code include a faulty brake switch, damaged wiring or connectors in the brake switch circuit, or a malfunctioning control module.

4. How can I diagnose the U11BC RAM code?

Diagnosing the U11BC RAM code involves checking the brake switch for proper operation, inspecting the wiring and connectors for any damage, and using a scan tool to communicate with the vehicle's control module.

5. How can I repair the U11BC RAM code?

To repair the U11BC RAM code, you may need to replace the brake switch if it is faulty, repair any damaged wiring or connectors in the circuit, or reprogram the control module if necessary.

6. Can I drive my vehicle with the U11BC RAM code present?

It is not recommended to drive your vehicle with the U11BC RAM code present, as it may affect the proper functioning of critical safety systems like the brake lights and cruise control.

7. How much does it typically cost to repair the U11BC RAM code?

The cost of repairing the U11BC RAM code can vary depending on the specific cause of the issue and the labor rates of the repair shop. It is advisable to get a diagnostic assessment to determine the exact cost.

8. Can I reset the U11BC RAM code on my own?

You can attempt to reset the U11BC RAM code using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from coming back.

9. Is the U11BC RAM code a serious issue?

The U11BC RAM code should be addressed promptly to ensure the proper functioning of the vehicle's brake lights and other related systems. Ignoring the issue could potentially lead to safety hazards.

10. How can I prevent the U11BC RAM code from occurring in the future?

To prevent the U11BC RAM code from occurring in the future, it is important to regularly inspect and maintain the brake switch, wiring, and connectors in the brake switch circuit to ensure they are in good working condition.