AutoCodes – GMC – C0310 GMC

C0310 GMC Code - Motor A/B Circuit Open

Quick Answer

The transfer case motor is a bi-directional, permanent magnet, D.C. Common causes include Faulty Transfer Case Motor, Transfer Case Motor harness is open or shorted, Transfer Case Motor 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: C0310 GMC indicates Motor A/B Circuit Open.
Common causes: Common causes include Faulty Transfer Case Motor, Transfer Case Motor harness is open or shorted, Transfer Case Motor 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 2,438

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 18, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code C0310 GMC Description

The transfer case motor is a bi-directional, permanent magnet, D.C. motor. When energized, (through Motor Control A or Motor Control B, the ground is provided by the opposing Motor Control circuit and then grounded through the transfer case shift control module ground circuit), the motor, through a series of gears, rotates a shaft which moves the mode and range forks to shift the transfer case between 4H, AUTO 4WD, 2H, N, and 4L ranges. While the transfer case motor is energized the transfer case shift control module also energizes the solenoid for the transfer case lock. The motor lock is disabled (locking action released) and free turning of the transfer case motor and sector shaft is then allowed.

OBDII Code C0310 GMC - Motor A/B Circuit Open - AutoCodes.com — C0310 GMC Code - Motor A/B Circuit Open

What does this mean?

What are the Possible Causes of the DTC C0310 GMC?

Faulty Transfer Case Motor
Transfer Case Motor harness is open or shorted
Transfer Case Motor circuit poor electrical connection

How to Fix the DTC C0310 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 C0310 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 C0310 GMC code?

Need more information on how to fix the C0310 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C0310 GMC 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 C0310 GMC Code

1. What are the common symptoms of OBDII code C0310 GMC "Motor A/B Circuit Open"?

- Common symptoms include the ABS warning light illuminating on the dashboard, potential loss of ABS functionality, and possible traction control issues.

2. What are the possible causes of OBDII code C0310 GMC "Motor A/B Circuit Open"?

- Possible causes include damaged or corroded wiring, loose connections, a faulty ABS module, or a malfunctioning wheel speed sensor.

3. How can I diagnose the OBDII code C0310 GMC "Motor A/B Circuit Open"?

- Diagnosing this code typically involves using a scan tool to retrieve the specific diagnostic trouble code, checking the wiring and connections related to the ABS system, and testing the ABS module and wheel speed sensors for proper functionality.

4. Can I still drive my vehicle with OBDII code C0310 GMC "Motor A/B Circuit Open"?

- It is not recommended to drive the vehicle with this code present, as it may compromise the effectiveness of the ABS system and potentially affect overall safety during braking.

5. How can I repair OBDII code C0310 GMC "Motor A/B Circuit Open"?

- Repair options may include repairing or replacing damaged wiring, securing loose connections, replacing a faulty ABS module, or replacing a malfunctioning wheel speed sensor.

6. Are there any DIY tips for fixing OBDII code C0310 GMC "Motor A/B Circuit Open"?

- DIY enthusiasts can start by visually inspecting the wiring and connections related to the ABS system for any visible damage or corrosion before moving on to testing components like the ABS module and wheel speed sensors.

7. Is it necessary to reset the OBDII code C0310 GMC "Motor A/B Circuit Open" after repairs?

- Yes, it is recommended to clear the trouble code after completing repairs to see if the issue has been resolved. This can be done using a scan tool capable of clearing diagnostic trouble codes.

8. How long does it typically take to repair OBDII code C0310 GMC "Motor A/B Circuit Open"?

- The repair time can vary depending on the specific cause of the issue, but it may take anywhere from a few hours to a full day to diagnose, repair, and test the ABS system components related to this code.

9. Can extreme weather conditions or rough driving affect the likelihood of OBDII code C0310 GMC "Motor A/B Circuit Open" occurring?

- Yes, extreme weather conditions or rough driving can potentially contribute to the development of issues leading to this code, such as damaging wiring or causing loose connections within the ABS system.

10. Is it recommended to seek professional help for diagnosing and repairing OBDII code C0310 GMC "Motor A/B Circuit Open"?

- If you are not experienced in diagnosing or repairing ABS system issues, it is advisable to seek professional assistance to ensure the problem is properly identified and resolved to maintain safe driving conditions.