AutoCodes – Chevrolet – P2161 Chevrolet

P2161 Chevrolet Code - Vehicle Speed Sensor 2 Circuit Intermittent

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 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: P2161 Chevrolet indicates Vehicle Speed Sensor 2 Circuit Intermittent.
Common causes: Common causes include Faulty Vehicle Speed Sensor (VSS), 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 5,433

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 Sep 08, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P2161 Chevrolet 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. The Diagnostic Trouble Code (DTC) will be set when there is a loss of speed signal from the transfer case speed sensor.

OBDII Code P2161 Chevrolet - Vehicle Speed Sensor 2 Circuit Intermittent - AutoCodes.com — P2161 Chevrolet Code - Vehicle Speed Sensor 2 Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P2161 Chevrolet?

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

How to Fix the DTC P2161 Chevrolet?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2161 Chevrolet 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.

Need more information about the P2161 Chevrolet code?

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Information for Specific Chevrolet Models

P2161 2014 Chevrolet Silverado — Vehicle Speed Sensor 2 Circuit Intermittent
P2161 2015 Chevrolet Silverado — Vehicle Speed Sensor 2 Circuit Intermittent
P2161 2016 Chevrolet Silverado — Vehicle Speed Sensor 2 Circuit Intermittent
P2161 2017 Chevrolet Silverado — Vehicle Speed Sensor 2 Circuit Intermittent
P2161 2018 Chevrolet Silverado — Vehicle Speed Sensor 2 Circuit Intermittent

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 P2161 Chevrolet Code

1. What does the OBDII code P2161 mean on a Chevrolet?

P2161 indicates an intermittent issue in the Vehicle Speed Sensor 2 (VSS2) circuit, which monitors the vehicle's speed and sends data to the engine control module (ECM).

2. What are the common symptoms of a P2161 code in a Chevrolet?

Symptoms may include erratic or inaccurate speedometer readings, poor transmission shifting, reduced fuel efficiency, or activation of the check engine light.

3. What causes the P2161 code to appear in a Chevrolet?

Common causes include a faulty vehicle speed sensor, damaged wiring or connectors in the VSS2 circuit, a malfunctioning ECM, or corrosion on electrical contacts.

4. Can I drive my Chevrolet with a P2161 code?

While the vehicle may still be drivable, it can experience performance issues such as erratic shifting or reduced fuel efficiency. It's best to address the issue promptly to avoid further damage.

5. How do I diagnose a P2161 code on my Chevrolet?

Start by inspecting the VSS2 wiring and connectors for damage or corrosion. Use a multimeter to test the sensor's resistance and verify the circuit's continuity. A scan tool may also help monitor live data from the speed sensor.

6. How do I fix a P2161 code on a Chevrolet?

Repairs may include replacing the faulty vehicle speed sensor, repairing or replacing damaged wiring or connectors, cleaning corroded terminals, or updating/reprogramming the ECM if necessary.

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

The VSS2 is typically located on or near the transmission or transfer case, depending on the vehicle model. Consult your vehicle's service manual for the exact location.

8. How much does it cost to fix a P2161 code on a Chevrolet?

Repair costs vary based on the cause but generally range from $100 to $300 for parts and labor, with speed sensor replacement being the most common fix.

9. Can a P2161 code affect my Chevrolet's transmission?

Yes, a faulty VSS2 can lead to erratic transmission shifting or failure to shift properly, as the transmission relies on accurate speed data to function correctly.

10. Will clearing the P2161 code on my Chevrolet fix the issue?

Clearing the code will temporarily turn off the check engine light, but the underlying problem must be addressed; otherwise, the code will return.