AutoCodesGMC – C0620 2018 GMC Sierra

C0620 2018 GMC Sierra Code - Right Front Position Sensor Circuit

Quick Answer

The Suspension Control Module supplies a 5 V reference signal to each Suspension Position Sensor. Common causes include Faulty Right Front Position Sensor, Right Front Position Sensor harness is open or shorted, Right Front Position 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
C0620 2018 GMC Sierra indicates Right Front Position Sensor Circuit.
Common causes
Common causes include Faulty Right Front Position Sensor, Right Front Position Sensor harness is open or shorted, Right Front Position 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 227
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 16, 2023
💬 Need more help? Ask Coddy for instant answers — it's free!

Code C0620 2018 GMC Sierra Description

The Suspension Control Module supplies a 5 V reference signal to each Suspension Position Sensor. The Suspension Position Sensors supply a signal of 0.35–4.75 V to the Suspension Control Module which represents the position between the body and the wheel. The sensors are also grounded through the Suspension Control Module. The Diagnostic Trouble Code (DTC) will be set when the Suspension Control Module measures a Suspension Position Sensor signal less than 0.35 V or greater than 4.75 V for more than 5 s while the vehicle is operated under normal driving conditions.
OBDII Code C0620 2018 GMC Sierra - Right Front Position Sensor Circuit - AutoCodes.com
C0620 2018 GMC Sierra Code - Right Front Position Sensor Circuit

What are the Possible Causes of the DTC C0620 2018 GMC Sierra?

  • Faulty Right Front Position Sensor
  • Right Front Position Sensor harness is open or shorted
  • Right Front Position Sensor circuit poor electrical connection
  • Faulty Suspension Control Module

How to Fix the DTC C0620 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 C0620 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 C0620 2018 GMC Sierra code?

Need more information on how to fix the C0620 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0620 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 C0620 2018 GMC Sierra Code

What does the OBDII code C0620 mean for a 2018 GMC Sierra?

C0620 indicates an issue with the Right Front Position Sensor Circuit, which monitors the vehicle's suspension position on the front right side.

What are common symptoms of code C0620 in a 2018 GMC Sierra?

Symptoms include suspension warning lights, changes in ride quality, or noticeable unevenness in the vehicle's stance.

What causes code C0620 in a 2018 GMC Sierra?

Common causes include a faulty position sensor, damaged wiring or connectors, or issues with the suspension control module.

Can I drive my 2018 GMC Sierra with code C0620 active?

While the vehicle may still be drivable, ignoring the code can lead to suspension performance issues or uneven tire wear over time.

How do you diagnose code C0620 on a 2018 GMC Sierra?

Diagnosing involves checking the position sensor, inspecting the wiring and connectors, and scanning the suspension control module for additional codes.

What tools are needed to fix code C0620 in a 2018 GMC Sierra?

You may need an OBDII scanner, a multimeter for electrical testing, and basic tools for accessing the sensor and wiring.

How much does it cost to repair code C0620 on a 2018 GMC Sierra?

Repair costs can range from $100 to $300, depending on whether the issue is with the sensor, wiring, or control module.

Can a faulty suspension control module trigger code C0620?

Yes, a malfunctioning suspension control module can misinterpret sensor data and trigger this code.

Is the Right Front Position Sensor specific to the GMC Sierra?

No, similar sensors are used in other vehicles, but the code C0620 specifically refers to the GMC Sierra's front right suspension sensor circuit.

How can I prevent code C0620 from reoccurring in my 2018 GMC Sierra?

Regularly inspect suspension components for damage, ensure wiring is secure, and address any warning signs promptly to avoid recurring issues.

Discuss the causes and fixes for C0620 2018 GMC Sierra OBDII Code

Code C0620 2018 GMC Sierra comments

No comments found for this page.

AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play