AutoCodes – GMC – P2159 GMC

P2159 GMC Code - Vehicle Speed Sensor 2 Range/Performance

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: P2159 GMC indicates Vehicle Speed Sensor 2 Range/Performance.
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 1,230

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 P2159 GMC 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 P2159 GMC - Vehicle Speed Sensor 2 Range/Performance - AutoCodes.com — P2159 GMC Code - Vehicle Speed Sensor 2 Range/Performance

What does this mean?

What are the Possible Causes of the DTC P2159 GMC?

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 P2159 GMC?

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 P2159 GMC 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 P2159 GMC Code

1. What are the common symptoms of OBDII code P2159 in a GMC vehicle?

- Common symptoms include issues with the vehicle's speedometer, cruise control, and potential stalling or hesitation while driving.

2. What does the OBDII code P2159 in a GMC indicate?

- The code P2159 indicates a problem with the Vehicle Speed Sensor 2 Range/Performance.

3. What are some possible causes of OBDII code P2159 in a GMC?

- Possible causes include a faulty vehicle speed sensor, damaged wiring or connectors, or issues with the sensor's alignment.

4. How can I diagnose the cause of OBDII code P2159 in my GMC vehicle?

- Diagnosing the code usually involves inspecting the vehicle speed sensor, checking the wiring and connectors for damage, and testing the sensor's output using a multimeter.

5. Can a faulty vehicle speed sensor cause other issues besides triggering OBDII code P2159?

- Yes, a faulty vehicle speed sensor can also lead to inaccurate speedometer readings, erratic shifting in automatic transmissions, and problems with the vehicle's cruise control system.

6. How can I repair OBDII code P2159 in my GMC vehicle?

- Repairing the code typically involves replacing the faulty vehicle speed sensor, repairing any damaged wiring or connectors, and clearing the error code using an OBDII scanner.

7. Is it safe to continue driving with OBDII code P2159 present in a GMC vehicle?

- It is generally not recommended to continue driving with the code present, as it can lead to further issues with the vehicle's performance and drivability.

8. Can I reset OBDII code P2159 in my GMC without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is important to address the root cause of the problem to prevent the code from reappearing.

9. How much does it typically cost to repair OBDII code P2159 in a GMC vehicle?

- The cost of repairing the code can vary depending on the cause of the issue, but it may range from around $100 to $300 for parts and labor.

10. Does OBDII code P2159 affect the emissions system in a GMC vehicle?

- While the code itself may not directly affect the emissions system, it is still important to address and repair the issue to ensure the vehicle is running efficiently and to prevent potential future problems.