P2161 2018 GMC Sierra 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 2018 GMC Sierra 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.
Code P2161 2018 GMC Sierra Description
What are the Possible Causes of the DTC P2161 2018 GMC Sierra?
- 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 2018 GMC Sierra?
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 P2161 2018 GMC Sierra 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 2018 GMC Sierra code?
Need more information on how to fix the P2161 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2161 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2161 2018 GMC Sierra Code
1. What does the OBDII code P2161 mean on a 2018 GMC Sierra?
P2161 indicates an intermittent issue with the Vehicle Speed Sensor (VSS) 2 circuit, which can affect the vehicle's speed readings and performance.
2. What are the common symptoms of code P2161 in a 2018 GMC Sierra?
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 on a GMC Sierra?
Common causes include a faulty Vehicle Speed Sensor 2, damaged wiring or connectors in the VSS circuit, or issues with the Powertrain Control Module (PCM).
4. Can I drive my 2018 GMC Sierra with the P2161 code?
While the vehicle may still be drivable, it could experience performance issues or unsafe driving conditions due to inaccurate speed readings, so it’s best to address the issue promptly.
5. How do I diagnose the P2161 code on my GMC Sierra?
Diagnosis involves using a scan tool to check for additional codes, inspecting the VSS 2 and its wiring for damage, and testing the sensor for proper functionality.
6. How do I fix the P2161 code on a 2018 GMC Sierra?
Repairs may include replacing the faulty Vehicle Speed Sensor 2, repairing damaged wiring or connectors, or reprogramming or replacing the PCM if necessary.
7. Where is Vehicle Speed Sensor 2 located on a 2018 GMC Sierra?
The Vehicle Speed Sensor 2 is typically located on the transmission or transfer case, depending on the drivetrain configuration.
8. How much does it cost to fix the P2161 code on a GMC Sierra?
Repair costs can vary but generally range from $100 to $300 for sensor replacement, plus labor, depending on the shop rates and parts used.
9. What tools are needed to fix the P2161 code?
You may need an OBDII scan tool, multimeter, and basic hand tools to diagnose and replace the Vehicle Speed Sensor 2.
10. Can a bad PCM cause the P2161 code in a 2018 GMC Sierra?
Yes, a malfunctioning PCM can sometimes cause the P2161 code if it fails to properly process the data from the Vehicle Speed Sensor 2.
Discuss the causes and fixes for P2161 2018 GMC Sierra OBDII Code
Code P2161 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
