AutoCodes – Chevrolet – C0308 Chevrolet

C0308 Chevrolet Code - Motor A/B Circuit Low

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: C0308 Chevrolet indicates Motor A/B Circuit Low.
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.

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Code Popularity 10,906

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
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Code C0308 Chevrolet 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.
This DTC detects a short to ground in Motor Control A or Motor Control B CKT.

OBDII Code C0308 Chevrolet - Motor A/B Circuit Low - AutoCodes.com — C0308 Chevrolet Code - Motor A/B Circuit Low

What does this mean?

What are the Possible Causes of the DTC C0308 Chevrolet?

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

How to Fix the DTC C0308 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0308 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.

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Need Help with the Code?

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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 C0308 Chevrolet Code

1. What are the common symptoms of OBDII code C0308 Chevrolet (Motor A/B Circuit Low)?

- Common symptoms include poor engine performance, rough idling, stalling, and illuminated check engine light.

2. What are the possible causes of OBDII code C0308 Chevrolet (Motor A/B Circuit Low)?

- The code may be triggered by issues such as a faulty motor, damaged wiring, poor electrical connections, or a defective control module.

3. How can I diagnose the OBDII code C0308 Chevrolet (Motor A/B Circuit Low)?

- Diagnosis involves using a scan tool to retrieve the trouble code, inspecting the motor and wiring for any visible damage, and testing the electrical connections.

4. Can a DIY enthusiast repair OBDII code C0308 Chevrolet (Motor A/B Circuit Low)?

- While some DIYers may be able to address this issue by checking and repairing wiring connections, it is recommended to seek professional help for accurate diagnosis and repair.

5. What are the repair options for OBDII code C0308 Chevrolet (Motor A/B Circuit Low)?

- Repair options include replacing the faulty motor, repairing damaged wiring, ensuring proper electrical connections, and resetting the code with a scan tool.

6. Is it safe to continue driving with OBDII code C0308 Chevrolet (Motor A/B Circuit Low) present?

- It is not recommended to continue driving with this code as it can lead to further engine issues and potential safety hazards. It is best to address the problem promptly.

7. How can I prevent OBDII code C0308 Chevrolet (Motor A/B Circuit Low) from reoccurring?

- Regular maintenance, timely repairs of any related issues, and proper handling of the vehicle can help prevent the code from reoccurring.

8. How long does it typically take to repair OBDII code C0308 Chevrolet (Motor A/B Circuit Low)?

- The repair time can vary depending on the exact cause of the issue and the complexity of the repair. It is advisable to consult a professional for an accurate estimate.

9. Can weather conditions affect the triggering of OBDII code C0308 Chevrolet (Motor A/B Circuit Low)?

- Extreme weather conditions or moisture exposure can potentially impact the electrical components related to this code and contribute to its triggering.

10. Is resetting the OBDII code C0308 Chevrolet (Motor A/B Circuit Low) sufficient to resolve the issue?

- Simply resetting the code may temporarily clear the check engine light, but it is essential to address the underlying cause to prevent the code from reoccurring.