AutoCodes – Cadillac – P2159 Cadillac

P2159 Cadillac 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 Cadillac 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 1,083

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

What does this mean?

What are the Possible Causes of the DTC P2159 Cadillac?

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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What are the common symptoms of OBDII code P2159 in a Cadillac related to the Vehicle Speed Sensor 2 Range/Performance issue?

- Common symptoms include erratic speedometer readings, issues with cruise control functionality, and potential stalling or hesitation during acceleration.

2. What can cause the OBDII code P2159 to trigger in a Cadillac?

- The code may be triggered by a faulty vehicle speed sensor, damaged wiring or connectors related to the sensor, or issues with the sensor's signal.

3. How can I diagnose the Vehicle Speed Sensor 2 Range/Performance issue in my Cadillac when OBDII code P2159 is present?

- Diagnosing the problem involves checking the vehicle speed sensor for proper operation, inspecting the wiring and connectors for damage, and conducting a thorough scan of the vehicle's systems for related issues.

4. Can a Vehicle Speed Sensor 2 Range/Performance problem be fixed without professional help in a Cadillac?

- Depending on your skill level and access to tools, you may be able to address simple issues such as loose connections or damaged wiring yourself. However, more complex repairs may require professional assistance.

5. What are some repair tips for resolving the OBDII code P2159 related to the Vehicle Speed Sensor 2 in a Cadillac?

- Repair tips may include checking and cleaning sensor connectors, replacing the vehicle speed sensor if necessary, and ensuring all wiring related to the sensor is intact and functioning properly.

6. Is it safe to continue driving my Cadillac with the OBDII code P2159 active?

- It is not advisable to continue driving your Cadillac with this code active, as it can lead to inaccurate speed readings and potentially affect the vehicle's performance and safety.

7. Can weather conditions or driving habits contribute to triggering the Vehicle Speed Sensor 2 Range/Performance issue in a Cadillac?

- Extreme weather conditions or aggressive driving habits can potentially impact the vehicle speed sensor's performance and trigger the code P2159 in a Cadillac.

8. How long does it typically take to repair the Vehicle Speed Sensor 2 Range/Performance problem in a Cadillac?

- The repair time can vary depending on the exact cause of the issue. Simple fixes like reconnecting loose wiring may take a short time, while sensor replacement or more extensive repairs could take longer.

9. Are there any preventive measures to avoid encountering the Vehicle Speed Sensor 2 Range/Performance issue in a Cadillac?

- Regular maintenance checks, including monitoring the vehicle speed sensor's performance, can help identify potential issues early and prevent the triggering of the OBDII code P2159.

10. Can resetting the OBDII system clear the P2159 code related to the Vehicle Speed Sensor 2 issue in a Cadillac?

- While resetting the system may temporarily clear the code, it is important to diagnose and address the underlying problem to prevent the code from reoccurring.