AutoCodesChevrolet – C0306 Chevrolet

C0306 Chevrolet Code - Range Actuator Control Circuit

Quick Answer

The Transfer Case Motor, also known as the transfer case range actuator, is a bi-directional, permanent magnet, DC motor. Common causes include Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator), 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
C0306 Chevrolet indicates Range Actuator Control Circuit.
Common causes
Common causes include Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator), 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 30,331
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jul 05, 2023
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Code C0306 Chevrolet Description

The Transfer Case Motor, also known as the transfer case range actuator, is a bi-directional, permanent magnet, DC motor. When energized, through the transfer case clockwise circuit or transfer case counterclockwise circuit, the ground is provided by the opposing motor control circuit which becomes grounded through the transfer case control module ground circuit. The transfer case range actuator, through a series of gears, rotates the transfer case control actuator shaft which moves the transfer case two/four-wheel drive actuator cam and transfer case high/low shift fork in order to shift the transfer case between the following modes or ranges: 2WD, 4WD/AWD Automatic, 4WD High/Locked, 4WD Low and Neutral.
OBDII Code C0306 Chevrolet - Range Actuator Control Circuit - AutoCodes.com
C0306 Chevrolet Code - Range Actuator Control Circuit

What are the Possible Causes of the DTC C0306 Chevrolet?

  • Faulty Transfer Case Motor (Transfer Case Two/Four Wheel Drive Actuator)
  • Transfer Case Motor harness is open or shorted
  • Transfer Case Motor circuit poor electrical connection
  • Faulty Transfer Case Control Module

How to Fix the DTC C0306 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.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C0306 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.

Need more information about the C0306 Chevrolet code?

Need more information on how to fix the C0306 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Chevrolet Models

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 C0306 Chevrolet Code

1. What are the common symptoms of OBDII code C0306 in a Chevrolet related to the Range Actuator Control Circuit?

- Common symptoms include rough shifting, hesitation during acceleration, and illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code C0306 in a Chevrolet?

- The code C0306 can be caused by a faulty range actuator, damaged wiring or connectors, or issues with the transmission control module.

3. How can I diagnose the OBDII code C0306 in my Chevrolet?

- A thorough diagnostic scan using an OBDII scanner can help identify the specific cause of the code. Checking the wiring and connectors related to the range actuator is also recommended.

4. Can driving with OBDII code C0306 in a Chevrolet cause further damage?

- Continuing to drive with code C0306 may lead to poor performance, reduced fuel efficiency, and potential damage to other transmission components over time.

5. Is it safe to ignore OBDII code C0306 in a Chevrolet?

- Ignoring code C0306 can result in ongoing transmission issues and may lead to more costly repairs in the future. It is recommended to address the code promptly.

6. How can I repair OBDII code C0306 in my Chevrolet?

- Repairing code C0306 may involve replacing the faulty range actuator, repairing damaged wiring, or addressing issues with the transmission control module as needed.

7. Are there any DIY tips for fixing OBDII code C0306 in a Chevrolet?

- While some basic troubleshooting like checking for loose connections or damaged wiring can be done DIY, addressing the root cause of the code may require professional diagnosis and repair.

8. Can a malfunctioning range actuator cause other OBDII codes to appear in a Chevrolet?

- Yes, a malfunctioning range actuator can lead to related codes such as P0700 (Transmission Control System Malfunction) or P0705 (Transmission Range Sensor Circuit Malfunction).

9. How long does it typically take to repair OBDII code C0306 in a Chevrolet?

- The repair time for code C0306 can vary depending on the specific cause and the extent of the issue. It may take a few hours to a full day for diagnosis and repair.

10. Is it recommended to reset the OBDII codes after repairing C0306 in a Chevrolet?

- Yes, resetting the OBDII codes after repairing C0306 allows for a fresh start and ensures that any lingering issues are properly addressed.

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