AutoCodes – GMC – B291B 2015 GMC Sierra

B291B 2015 GMC Sierra Code - Content Theft Deterrent Sensor

Quick Answer

The Body Control Module (BCM) performs various communication fault detection tests to determine if a software, hardware, or communication concern exists with the ultrasonic intrusion sensor. Common causes include Faulty Content Theft Deterrent Sensor Module, Content Theft Deterrent Sensor Module harness is open or shorted, Content Theft Deterrent Sensor Module 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: B291B 2015 GMC Sierra indicates Content Theft Deterrent Sensor.
Common causes: Common causes include Faulty Content Theft Deterrent Sensor Module, Content Theft Deterrent Sensor Module harness is open or shorted, Content Theft Deterrent Sensor Module 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 242

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 Jun 01, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B291B 2015 GMC Sierra Description

The Body Control Module (BCM) performs various communication fault detection tests to determine if a software, hardware, or communication concern exists with the ultrasonic intrusion sensor. The sensor being disconnected, a poor connection at the connector, or the vehicle battery being discharged could all cause the communication to be interrupted. This interruption stops the self-test from completing which causes Diagnostic Trouble Code (DTC) B291B. This is not because of the sensor failing, it is because of a previous or existing open connection between the sensor and the BCM. Restoring this connection and then arming the theft system will complete the test and allow the DTC to be cleared. The DTC will be set when the BCM cannot communicate with the ultrasonic intrusion sensor.

OBDII Code B291B 2015 GMC Sierra - Content Theft Deterrent Sensor - AutoCodes.com — B291B 2015 GMC Sierra Code - Content Theft Deterrent Sensor

What does this mean?

What are the Possible Causes of the DTC B291B 2015 GMC Sierra?

Faulty Content Theft Deterrent Sensor Module
Content Theft Deterrent Sensor Module harness is open or shorted
Content Theft Deterrent Sensor Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B291B 2015 GMC Sierra?

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 B291B 2015 GMC Sierra 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 B291B 2015 GMC Sierra Code

1. What does OBDII code B291B in a 2015 GMC Sierra indicate?

The B291B code specifically relates to the Content Theft Deterrent Sensor in the vehicle.

2. What are the common symptoms of OBDII code B291B in a 2015 GMC Sierra?

Common symptoms include issues with the content theft deterrent system, such as false alarms or the system not functioning properly.

3. What are the possible causes of OBDII code B291B in a 2015 GMC Sierra?

The code can be triggered by a faulty content theft deterrent sensor, wiring issues, or problems with the theft deterrent module.

4. How serious is OBDII code B291B in a 2015 GMC Sierra?

While the code itself may not affect the drivability of the vehicle, it is important to address it to ensure the proper functioning of the theft deterrent system.

5. How can I diagnose OBDII code B291B in a 2015 GMC Sierra?

Diagnosis typically involves using a scan tool to read the code, checking the wiring and connections related to the content theft deterrent sensor, and testing the sensor itself.

6. Can I repair OBDII code B291B in a 2015 GMC Sierra myself?

Depending on your level of automotive expertise, you may be able to address the issue yourself by replacing the faulty sensor or repairing any wiring issues. However, professional help may be needed for more complex repairs.

7. What should I do if OBDII code B291B keeps coming back in my 2015 GMC Sierra?

If the code keeps reappearing after repairs, it may indicate an underlying issue that requires further inspection by a qualified mechanic to ensure proper diagnosis and repair.

8. Are there any tips to prevent OBDII code B291B in a 2015 GMC Sierra?

Regular maintenance checks and ensuring the content theft deterrent system is functioning properly can help prevent the recurrence of this code.

9. Can OBDII code B291B in a 2015 GMC Sierra cause other problems in the vehicle?

While the code itself may not directly cause drivability issues, a malfunctioning content theft deterrent system could potentially lead to security concerns or inconvenience.

10. Is it safe to continue driving with OBDII code B291B in a 2015 GMC Sierra?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent any potential security risks or further system malfunctions.