AutoCodes – GMC – B2955 2015 GMC Sierra

B2955 2015 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 2015 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 364

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 2015 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 2015 GMC Sierra - Security Sensor Data Circuit Malfunction - AutoCodes.com — B2955 2015 GMC Sierra Code - Security Sensor Data Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC B2955 2015 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 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 B2955 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.

Need more information about the B2955 2015 GMC Sierra code?

Need more information on how to fix the B2955 2015 GMC Sierra 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 B2955 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code B2955 in a 2015 GMC Sierra?

The common symptoms of OBDII code B2955 (Security Sensor Data Circuit Malfunction) in a 2015 GMC Sierra include issues with the security system, difficulty starting the vehicle, and the security light staying on.

2. What can cause the OBDII code B2955 in a 2015 GMC Sierra?

The OBDII code B2955 in a 2015 GMC Sierra is typically caused by a malfunction in the security sensor data circuit, faulty security sensor, wiring issues, or a problem with the body control module.

3. How can I diagnose the Security Sensor Data Circuit Malfunction in my 2015 GMC Sierra?

Diagnosing the Security Sensor Data Circuit Malfunction in a 2015 GMC Sierra involves using a diagnostic scanner to retrieve the specific fault code, inspecting the security sensor and its wiring for any damage, and testing the body control module for proper functioning.

4. Can I still drive my 2015 GMC Sierra with the B2955 code present?

It is not recommended to drive your 2015 GMC Sierra with the B2955 code present, as it may indicate a potential issue with the security system that could affect the vehicle's performance or safety.

5. How serious is the Security Sensor Data Circuit Malfunction in a 2015 GMC Sierra?

The Security Sensor Data Circuit Malfunction (B2955) in a 2015 GMC Sierra should be addressed promptly as it can impact the security and starting system of the vehicle, potentially leading to inconvenience or security concerns.

6. Are there any DIY repair tips for fixing the B2955 code in a 2015 GMC Sierra?

DIY repair tips for fixing the B2955 code in a 2015 GMC Sierra include checking and repairing any damaged wiring, ensuring the security sensor is properly connected, and resetting the fault code using a diagnostic scanner.

7. How much does it cost to repair the Security Sensor Data Circuit Malfunction in a 2015 GMC Sierra?

The cost to repair the Security Sensor Data Circuit Malfunction in a 2015 GMC Sierra can vary depending on the specific cause of the issue, but it may range from a few hundred to a thousand dollars at a dealership or repair shop.

8. Can resetting the OBDII code B2955 in my 2015 GMC Sierra fix the issue temporarily?

Resetting the OBDII code B2955 in a 2015 GMC Sierra may temporarily clear the fault code, but if the underlying issue causing the Security Sensor Data Circuit Malfunction is not addressed, the code is likely to reappear.