AutoCodes – Dodge – P2159 Dodge

P2159 Dodge 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, Vehicle Speed Sensor harness is open or shorted, Vehicle Speed 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: P2159 Dodge indicates Vehicle Speed Sensor 2 Range/Performance.
Common causes: Common causes include Faulty Vehicle Speed Sensor, Vehicle Speed Sensor harness is open or shorted, Vehicle Speed 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 4,244

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

What does this mean?

What are the Possible Causes of the DTC P2159 Dodge?

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

How to Fix the DTC P2159 Dodge?

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 Dodge 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 Dodge Code

1. What does the OBDII code P2159 mean on a Dodge?

P2159 indicates an issue with Vehicle Speed Sensor 2, specifically that its signal is outside the expected range or performance parameters.

2. What are the common symptoms of code P2159 in a Dodge?

Symptoms may include erratic speedometer readings, decreased fuel efficiency, poor transmission performance, or the activation of the check engine light.

3. What causes the P2159 code to appear on a Dodge vehicle?

Common causes include a faulty vehicle speed sensor, damaged wiring or connections, a malfunctioning PCM, or issues with the speed sensor's mounting.

4. Can I drive my Dodge with the P2159 code active?

While the vehicle may still be drivable, continuing to drive with this code can lead to transmission issues or reduced performance, so it’s best to address it promptly.

5. How do I diagnose the P2159 code on my Dodge?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the vehicle speed sensor and its wiring, and testing the sensor's functionality with a multimeter.

6. How do I fix code P2159 on a Dodge?

Repairs may include replacing the faulty vehicle speed sensor, repairing or replacing damaged wiring, or reprogramming/updating the PCM if necessary.

7. How much does it cost to fix the P2159 code on a Dodge?

The cost typically ranges from $100 to $300, depending on whether the issue is with the sensor, wiring, or PCM programming.

8. Can a faulty speed sensor cause transmission problems in a Dodge?

Yes, a malfunctioning speed sensor can lead to improper transmission shifting, reduced performance, or even transmission damage if not addressed.

9. How can I prevent the P2159 code from occurring again?

Regular maintenance, inspecting wiring for damage, and ensuring proper installation of the speed sensor can help prevent this code from recurring.

10. Does the P2159 code always mean the speed sensor is bad?

Not always. While the sensor is a common culprit, the code could also be caused by wiring issues, loose connections, or a PCM malfunction.

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