AutoCodes – GMC – B291B 2017 GMC Sierra

B291B 2017 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 2017 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 163

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 2017 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 2017 GMC Sierra - Content Theft Deterrent Sensor - AutoCodes.com — B291B 2017 GMC Sierra Code - Content Theft Deterrent Sensor

What does this mean?

What are the Possible Causes of the DTC B291B 2017 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 2017 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 2017 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.

Need more information about the B291B 2017 GMC Sierra 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 B291B 2017 GMC Sierra Code

1. What does OBDII code B291B for the Content Theft Deterrent Sensor in a 2017 GMC Sierra indicate?

The B291B code specifically points to a fault related to the Content Theft Deterrent Sensor on the GMC Sierra.

2. What are the common symptoms of OBDII code B291B in a 2017 GMC Sierra?

Common symptoms associated with code B291B may include issues with the vehicle's anti-theft system, such as false alarms or the system not arming properly.

3. What are the possible causes of OBDII code B291B in a 2017 GMC Sierra?

Potential causes of the B291B code can include a malfunctioning Content Theft Deterrent Sensor, wiring issues, a faulty control module, or a problem with the anti-theft system itself.

4. How can I diagnose the OBDII code B291B in my 2017 GMC Sierra?

Diagnosing code B291B typically involves using a diagnostic scanner to retrieve the code, inspecting the Content Theft Deterrent Sensor and related wiring, and testing the anti-theft system components for proper function.

5. Can I still drive my 2017 GMC Sierra with the B291B code present?

While the vehicle may still be operable with the B291B code, it is recommended to address the issue promptly to ensure the proper functioning of the anti-theft system.

6. How can I repair OBDII code B291B in my 2017 GMC Sierra?

Repairing the B291B code may involve replacing the Content Theft Deterrent Sensor, repairing any damaged wiring, resetting the control module, or addressing any other issues identified during diagnostics.

7. Is it possible to reset the B291B code in a 2017 GMC Sierra without professional help?

Resetting the B291B code can be done using a diagnostic scanner capable of clearing trouble codes. However, it is essential to address the underlying issue to prevent the code from reoccurring.

8. Are there any common mistakes to avoid when dealing with the B291B code in a 2017 GMC Sierra?

Common mistakes to avoid include overlooking wiring issues, ignoring symptoms of the anti-theft system malfunctioning, or attempting repairs without proper diagnostic procedures.

9. How much should I expect to pay to fix OBDII code B291B in my 2017 GMC Sierra?

The cost of repairing the B291B code can vary depending on the root cause of the issue, the needed parts, and whether you perform the repairs yourself or seek professional assistance.

10. Can a DIY enthusiast with basic automotive knowledge fix the B291B code in a 2017 GMC Sierra?

Depending on the DIYer's skill level and access to tools, addressing the B291B code may be possible. However, in-depth diagnostic procedures and intricate repairs may require professional assistance.