AutoCodes – GMC – C0620 GMC

C0620 GMC 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 GMC 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.

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Code Popularity 4,426

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 Jul 16, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C0620 GMC 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 GMC - Right Front Position Sensor Circuit - AutoCodes.com — C0620 GMC Code - Right Front Position Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC C0620 GMC?

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 GMC?

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 GMC 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 GMC code?

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

Need Help with the Code?

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

Information for Specific GMC Models

C0620 2014 GMC Sierra — Right Front Position Sensor Circuit
C0620 2015 GMC Sierra — Right Front Position Sensor Circuit
C0620 2016 GMC Sierra — Right Front Position Sensor Circuit
C0620 2017 GMC Sierra — Right Front Position Sensor Circuit
C0620 2018 GMC Sierra — Right Front Position Sensor Circuit

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 GMC Code

1. What are common symptoms of OBDII code C0620 in a GMC related to the Right Front Position Sensor Circuit?

Common symptoms include stability control system malfunctions, traction control issues, and possible ABS warning lights on the dashboard.

2. What are the possible causes of OBDII code C0620 in a GMC?

Potential causes may include a faulty right front position sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning electronic control unit (ECU).

3. How can I diagnose the root cause of OBDII code C0620 in my GMC?

Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault codes, inspecting the right front position sensor and its wiring for any visible damage, and conducting a thorough system check with the appropriate diagnostic tools.

4. Can I continue driving my GMC with OBDII code C0620 present?

It is not recommended to continue driving the vehicle with this code present, as it may affect the stability and control systems, potentially compromising safety on the road.

5. How can I repair OBDII code C0620 in a GMC related to the Right Front Position Sensor Circuit?

Repair options may include replacing the faulty right front position sensor, repairing or replacing damaged wiring or connectors, and resetting the system to clear the fault code.

6. Is it possible to reset OBDII code C0620 in a GMC without fixing the underlying issue?

While you can clear the fault code temporarily by resetting the ECU, the code is likely to reappear if the root cause of the issue is not addressed.

7. Are there any DIY tips for troubleshooting OBDII code C0620 in a GMC?

DIY enthusiasts can start by visually inspecting the right front position sensor and its wiring for any apparent damage before proceeding with more advanced diagnostic steps.

8. How much does it typically cost to repair OBDII code C0620 in a GMC at a professional auto repair shop?

The cost of repairs can vary depending on the extent of the damage and the specific components that need to be replaced, but it is advisable to consult with a trusted mechanic for an accurate estimate.

9. Can extreme weather conditions or rough terrain contribute to triggering OBDII code C0620 in a GMC?

Yes, harsh driving conditions, such as driving on rough terrain or exposure to extreme weather, can potentially contribute to sensor malfunctions or wiring damage that may trigger this fault code.

10. Is it necessary to have the OBDII code C0620 cleared by a professional after completing repairs on a GMC?

It is recommended to have the fault code cleared by a professional using an OBDII scanner after completing repairs to ensure that the issue has been successfully resolved and that the system is functioning properly.