AutoCodes – Buick – B2958 Buick

B2958 Buick Code - Security System Sensor Data Circuit High

Quick Answer

The Passlock™ system is provided in order to prevent vehicle theft if the ignition lock cylinder is forced to rotate or the ignition switch is operated while separated from the ignition lock cylinder case. Common causes include Faulty Security System Sensor, Security System Sensor harness is open or shorted, Security System Sensor 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: B2958 Buick indicates Security System Sensor Data Circuit High.
Common causes: Common causes include Faulty Security System Sensor, Security System Sensor harness is open or shorted, Security System Sensor 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 3,407

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 Feb 20, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2958 Buick Description

The Passlock™ system is provided in order to prevent vehicle theft if the ignition lock cylinder is forced to rotate or the ignition switch is operated while separated from the ignition lock cylinder case. The Body Control Module (BCM) provides security system sensor power and low reference for the Passlock™ sensor. The BCM also measures the security system sensor voltage.
When the correct key is used to start the vehicle, a magnet on the lock cylinder passes close to the Passlock™ sensor within the ignition lock cylinder case. The magnet activates the security hall effect sensor in the Passlock™ sensor which completes a circuit from the security sensor signal circuit through a resistor to the security sensor low reference circuit. The resistance value will vary from vehicle to vehicle. The BCM will measure the voltage on the security sensor signal circuit and compare this voltage to a previously learned voltage. If the voltage measured is within the valid range, the BCM will send a class 2 message to the Powertrain Control Module (PCM) to enable vehicle starting. If the voltage measured is not within the valid range, a class 2 message will be sent to the PCM to disable starting of the vehicle.

OBDII Code B2958 Buick - Security System Sensor Data Circuit High - AutoCodes.com — B2958 Buick Code - Security System Sensor Data Circuit High

What does this mean?

What are the Possible Causes of the DTC B2958 Buick?

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

How to Fix the DTC B2958 Buick?

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 B2958 Buick 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 B2958 Buick Code

1. What are the common symptoms of OBDII code B2958 in a Buick related to the Security System Sensor Data Circuit High?

The common symptoms include the security system warning light illuminating on the dashboard, difficulty starting the vehicle, or intermittent issues with the security system.

2. What are the possible causes of OBDII code B2958 in a Buick indicating a Security System Sensor Data Circuit High?

Potential causes may include a faulty security system sensor, damaged wiring in the sensor circuit, a loose connection in the sensor system, or a malfunctioning security system module.

3. How can I diagnose the OBDII code B2958 in my Buick related to the Security System Sensor Data Circuit High?

Diagnosing this code typically involves using a diagnostic scanner to retrieve the specific details of the fault code, checking the wiring and connections related to the security system sensor, and testing the sensor itself for proper operation.

4. Can I still drive my Buick with the OBDII code B2958 indicating a Security System Sensor Data Circuit High?

It is generally not recommended to drive your vehicle when this code is present, as it can lead to potential security system malfunctions or difficulties starting the car. It's best to address the issue promptly.

5. How can I repair OBDII code B2958 in my Buick if it indicates a Security System Sensor Data Circuit High?

Repairing this code may involve replacing a faulty security system sensor, repairing damaged wiring or connections, or reprogramming the security system module to resolve the circuit high issue.

6. Are there any quick tips to troubleshoot OBDII code B2958 in a Buick related to the Security System Sensor Data Circuit High?

Quick tips include checking for any visible damage to the wiring, ensuring all connections are secure, and consulting the vehicle's manual for specific troubleshooting steps related to the security system.

7. Will resetting the OBDII code B2958 in my Buick related to the Security System Sensor Data Circuit High make the issue go away?

Resetting the code may temporarily clear the warning light, but if the underlying issue causing the circuit high is not addressed, the code is likely to return. It's important to diagnose and repair the root cause of the problem.

8. Can extreme weather conditions affect the occurrence of OBDII code B2958 indicating a Security System Sensor Data Circuit High in a Buick?

Extreme weather conditions such as excessive heat or cold can potentially impact the performance of the security system sensor or its circuit, leading to the triggering of this fault code.

9. Is it necessary to take my Buick to a dealership for repair of OBDII code B2958 related to the Security System Sensor Data Circuit High?

While dealership service departments are equipped to handle this type of repair, independent automotive repair shops with experience in Buick vehicles should also be able to diagnose and repair the issue effectively.

10. How can I prevent OBDII code B2958 related to the Security System Sensor Data Circuit High from occurring in my Buick in the future?

Regular maintenance checks, ensuring proper care of the vehicle's electrical system, and addressing any security system issues promptly can help prevent the recurrence of this fault code.