AutoCodes – GMC – B2955 2016 GMC Sierra

B2955 2016 GMC Sierra Code - Security Sensor Data Circuit Malfunction

Quick Answer

When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the key is energized by the exciter coil surrounding the ignition lock cylinder. Common causes include Faulty Immobilizer Control Module, Immobilizer Control Module harness is open or shorted, Immobilizer Control 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: B2955 2016 GMC Sierra indicates Security Sensor Data Circuit Malfunction.
Common causes: Common causes include Faulty Immobilizer Control Module, Immobilizer Control Module harness is open or shorted, Immobilizer Control 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 289

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 B2955 2016 GMC Sierra Description

When an ignition key is inserted into the ignition lock cylinder and the ignition is switched ON, the transponder embedded in the key is energized by the exciter coil surrounding the ignition lock cylinder. The transponder transmits a signal to the Immobilizer Control Module. The Immobilizer Control Module translates this signal to a serial data message which is sent to the Body Control Module (BCM). The BCM then compares this value to a value stored in memory. If the value is correct, the BCM will send the prerelease password via the serial data circuit to the Engine Control Module (ECM). If the learned key code does not match or a transponder value is not received, the BCM will send the start disable password to the ECM. The Diagnostic Trouble Code (DTC) will be set when the BCM detects a circuit fault on the immobilizer antenna circuits.

OBDII Code B2955 2016 GMC Sierra - Security Sensor Data Circuit Malfunction - AutoCodes.com — B2955 2016 GMC Sierra Code - Security Sensor Data Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B2955 2016 GMC Sierra?

Faulty Immobilizer Control Module
Immobilizer Control Module harness is open or shorted
Immobilizer Control Module circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2955 2016 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 B2955 2016 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 B2955 2016 GMC Sierra code?

Need more information on how to fix the B2955 2016 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2955 2016 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 B2955 2016 GMC Sierra Code

1. What does OBDII code B2955 for a 2016 GMC Sierra indicate?

The B2955 code specifically points to a Security Sensor Data Circuit Malfunction in the vehicle.

2. What are the common symptoms of a Security Sensor Data Circuit Malfunction in a 2016 GMC Sierra?

Common symptoms include issues with the vehicle's security system, such as the alarm not working properly or the vehicle not starting.

3. What can cause the B2955 code to trigger in a 2016 GMC Sierra?

The code can be triggered by issues with the security sensor itself, wiring problems, a faulty security module, or a malfunction in the security system circuit.

4. How serious is the Security Sensor Data Circuit Malfunction in a 2016 GMC Sierra?

While the vehicle may still be operable with this issue, it is important to address it promptly to ensure the proper functioning of the security system.

5. Can I still drive my 2016 GMC Sierra with the B2955 code present?

It is generally safe to drive the vehicle with this code, but it is recommended to have it diagnosed and repaired as soon as possible to avoid potential security issues.

6. How can I diagnose the Security Sensor Data Circuit Malfunction in my 2016 GMC Sierra?

Diagnosis typically involves using an OBDII scanner to read the code and then conducting further testing to pinpoint the exact cause, which may require professional assistance.

7. What are some repair tips for fixing the B2955 code in a 2016 GMC Sierra?

Repairing this issue may involve checking and repairing wiring connections, replacing the security sensor, or addressing any faults in the security system components.

8. Can I reset the B2955 code in my 2016 GMC Sierra on my own?

You can attempt to clear the code using an OBDII scanner, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

9. How much does it cost to repair the Security Sensor Data Circuit Malfunction in a 2016 GMC Sierra?

The cost of repairs can vary depending on the specific cause of the issue, but it is advisable to consult a professional for an accurate diagnosis and cost estimate.

10. Is the Security Sensor Data Circuit Malfunction covered under warranty for a 2016 GMC Sierra?

Depending on the vehicle's warranty status and the specific circumstances, this issue may be covered under warranty, so it is recommended to check with your dealership or manufacturer for more information.