AutoCodes – Buick – P2158 Buick

P2158 Buick Code - Vehicle Speed Sensor 2

Quick Answer

The Vehicle Speed Sensor (VSS) provides vehicle speed information to the Engine Control Module (ECM). Common causes include Faulty Vehicle Speed Sensor (VSS), Vehicle Speed Sensor (VSS) harness is open or shorted, Vehicle Speed Sensor (VSS) 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: P2158 Buick indicates Vehicle Speed Sensor 2.
Common causes: Common causes include Faulty Vehicle Speed Sensor (VSS), Vehicle Speed Sensor (VSS) harness is open or shorted, Vehicle Speed Sensor (VSS) 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 1,137

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 27, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2158 Buick Description

The Vehicle Speed Sensor (VSS) provides vehicle speed information to the Engine Control Module (ECM). The VSS is a permanent magnet generator. The sensor is mounted in the transfer case facing the rear internal gear which is splined to the output shaft assembly. As the output shaft and internal gear rotate, the toothed rotor of the internal gear produces AC voltage as the rotor teeth pass through the magnetic field of the sensor. The AC voltage level and the number of pulses increase as the speed of the vehicle increases. The ECM converts the voltage to vehicle speed. The ECM uses the output shaft speed signal to determine shift timing, as well as transfer case range.

OBDII Code P2158 Buick - Vehicle Speed Sensor 2 - AutoCodes.com — P2158 Buick Code - Vehicle Speed Sensor 2

What does this mean?

What are the Possible Causes of the DTC P2158 Buick?

Faulty Vehicle Speed Sensor (VSS)
Vehicle Speed Sensor (VSS) harness is open or shorted
Vehicle Speed Sensor (VSS) circuit poor electrical connection

How to Fix the DTC P2158 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 P2158 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 P2158 Buick Code

1. What does the OBDII code P2158 mean on a Buick?

Code P2158 indicates an issue with Vehicle Speed Sensor 2, typically involving a malfunction or abnormal signal from the sensor.

2. What are the common symptoms of a P2158 code on a Buick?

Symptoms may include erratic speedometer readings, poor transmission shifting, reduced fuel efficiency, or the Check Engine Light turning on.

3. What causes the P2158 code to appear in a Buick?

Common causes include a faulty vehicle speed sensor, damaged wiring or connectors, or issues with the powertrain control module (PCM).

4. Can I drive my Buick with a P2158 code?

Driving with a P2158 code may be possible but is not recommended, as it can affect transmission performance and lead to unsafe driving conditions.

5. How do I fix a P2158 code on a Buick?

Start by inspecting the speed sensor wiring and connectors for damage. If they are intact, the sensor may need to be replaced. In some cases, the PCM may require reprogramming.

6. How much does it cost to fix a P2158 code on a Buick?

Repair costs vary but typically range from $100 to $250, depending on whether the issue is with the sensor, wiring, or PCM.

7. Where is Vehicle Speed Sensor 2 located in a Buick?

Vehicle Speed Sensor 2 is usually mounted on the transmission or near the wheel hub, depending on the Buick model.

8. Can a P2158 code cause transmission problems in a Buick?

Yes, a malfunctioning speed sensor can lead to shifting issues or transmission performance problems.

9. How can I prevent a P2158 code from occurring again?

Regularly inspect and maintain wiring and connectors, and ensure the speed sensors are clean and free of debris.

10. Will clearing the P2158 code with a scanner fix the problem?

Clearing the code may temporarily turn off the Check Engine Light, but the issue will persist unless the underlying problem is resolved.

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