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Engine-Codes – GMC – B291B 2016 GMC Sierra

B291B 2016 GMC Sierra Code - Content Theft Deterrent Sensor

Quick Answer

The B291B diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Content Theft Deterrent Sensor. Common causes include Faulty Content Theft Deterrent Sensor, Wiring issues or electrical connections related to the sensor, Corrosion or damage to the sensor due to environmental factors. 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 2016 GMC Sierra indicates Content Theft Deterrent Sensor.
Common causes
Common causes include Faulty Content Theft Deterrent Sensor, Wiring issues or electrical connections related to the sensor, Corrosion or damage to the sensor due to environmental factors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code B291B 2016 GMC Sierra Description

The B291B diagnostic trouble code (DTC) for a 2016 GMC Sierra relates to the Content Theft Deterrent Sensor. This sensor is part of the vehicle's security system and is designed to detect unauthorized entry or tampering with the vehicle. When this code is triggered, it indicates a malfunction or fault with the sensor, which can compromise the effectiveness of the security system.

OBDII Code B291B 2016 GMC Sierra - Content Theft Deterrent Sensor
B291B 2016 GMC Sierra Code - Content Theft Deterrent Sensor

Common Causes of B291B 2016 GMC Sierra

  1. Faulty Content Theft Deterrent Sensor.
  2. Wiring issues or electrical connections related to the sensor.
  3. Corrosion or damage to the sensor due to environmental factors.
  4. Software or programming issues with the security system.
  5. Impact or physical damage to the sensor.

Symptoms of B291B 2016 GMC Sierra

  1. Constant or intermittent security system warnings on the dashboard.
  2. Inability to arm or disarm the security system.
  3. Alarm going off randomly or not going off when expected.
  4. Vehicle not starting or starting intermittently.
  5. Doors not locking or unlocking properly.

How to Fix B291B 2016 GMC Sierra

  1. Begin by conducting a thorough diagnostic scan to confirm the B291B DTC and identify the specific cause of the issue.
  2. Inspect the Content Theft Deterrent Sensor and its wiring for any visible damage or corrosion. Repair or replace as necessary.
  3. Check the security system's software and programming to ensure it is functioning correctly. Update or reprogram if needed.
  4. Test the sensor and security system to verify that the issue has been resolved and that the sensor is detecting unauthorized access properly.
  5. Clear the DTC from the vehicle's memory and reset the security system to ensure proper functionality.

Cost to Fix B291B 2016 GMC Sierra

The cost of repairing a Content Theft Deterrent Sensor can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts for this repair can range from $50 to $200, while labor costs can range from $100 to $300. Overall, you can expect to pay between $150 and $500 for this repair. Keep in mind that prices may vary based on location, vehicle make and model, and the extent of the repair needed. It is recommended to obtain quotes from local auto repair shops for a more accurate estimate.

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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 2016 GMC Sierra Code

1. What does OBDII code B291B for a 2016 GMC Sierra mean?

The code B291B indicates a problem with the Content Theft Deterrent (CTD) Sensor in the vehicle.

2. What are the common symptoms of a faulty Content Theft Deterrent Sensor?

Common symptoms include the alarm system not working properly, the vehicle's anti-theft features malfunctioning, or the alarm going off randomly.

3. What can cause the Content Theft Deterrent Sensor code B291B to trigger?

Possible causes for this code include a malfunctioning CTD sensor, wiring issues, a faulty control module, or a problem with the anti-theft system itself.

4. How can I diagnose the issue related to OBDII code B291B on my 2016 GMC Sierra?

Diagnosing the problem may require using a scan tool to retrieve the specific fault codes, inspecting the wiring connected to the CTD sensor, and testing the sensor's functionality.

5. Can I still drive my 2016 GMC Sierra with the B291B code present?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to ensure the proper functioning of the anti-theft system.

6. How do I repair a Content Theft Deterrent Sensor issue causing the B291B code?

Repairing the problem may involve replacing the faulty CTD sensor, repairing any damaged wiring, resetting the control module, or reprogramming the anti-theft system.

7. Will resetting the OBDII code B291B on my 2016 GMC Sierra fix the problem?

Resetting the code may temporarily clear the fault from the system, but if the underlying issue with the Content Theft Deterrent Sensor persists, the code is likely to reappear.

8. How much does it cost to repair a Content Theft Deterrent Sensor issue on a 2016 GMC Sierra?

The cost of repair can vary depending on the specific problem, parts needed, and labor rates, but it's advisable to consult a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast fix the B291B code related to the Content Theft Deterrent Sensor?

While some simple checks and repairs may be possible for a DIY enthusiast, diagnosing and resolving complex issues with the CTD sensor may require professional expertise and specialized tools.

10. How can I prevent future occurrences of the B291B code on my 2016 GMC Sierra?

Regular maintenance checks, keeping the anti-theft system in good condition, and addressing any issues promptly can help prevent the reoccurrence of the Content Theft Deterrent Sensor code B291B.

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