AutoCodes – GMC – C0324 GMC

C0324 GMC Code - Shorted Lock Solenoid Coil

Quick Answer

The transfer case shift control module controls the Transfer Case Lock Solenoid. Common causes include Faulty Transfer Case Motor/Encoder, Transfer Case Motor/Encoder harness is open or shorted, Transfer Case Motor/Encoder 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: C0324 GMC indicates Shorted Lock Solenoid Coil.
Common causes: Common causes include Faulty Transfer Case Motor/Encoder, Transfer Case Motor/Encoder harness is open or shorted, Transfer Case Motor/Encoder 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 1,459

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 C0324 GMC Description

The transfer case shift control module controls the Transfer Case Lock Solenoid. The lock is energized (locking action released, by grounding the Lock Control Circuit) during gear shifts and in AUTO 4WD mode of operation. When power or ground is removed from the lock solenoid (locking action applied, releasing the ground on the Lock Control Circuit), the Transfer Case Motor is prevented from moving. In this manner the system is capable of providing a 4H and 4L lock-up without the need of additional vehicle power to hold the Transfer Case in these positions.
This DTC detects a shorted lock solenoid coil, or the Lock Control Circuit shorted to 12 V.

OBDII Code C0324 GMC - Shorted Lock Solenoid Coil - AutoCodes.com — C0324 GMC Code - Shorted Lock Solenoid Coil

What does this mean?

What are the Possible Causes of the DTC C0324 GMC?

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

How to Fix the DTC C0324 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 C0324 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.

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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 C0324 GMC Code

1. What does the OBDII code C0324 mean on a GMC vehicle?

C0324 indicates a fault in the transfer case lock solenoid circuit, specifically a shorted lock solenoid coil.

2. What are the common symptoms of code C0324 in a GMC?

Symptoms may include the "Service 4WD" light on the dashboard, inability to switch between 4WD modes, and unusual noises from the transfer case.

3. What causes the C0324 code to trigger in a GMC?

Common causes include a shorted lock solenoid coil, damaged wiring or connectors in the transfer case circuit, or a faulty transfer case control module (TCCM).

4. How is the C0324 code diagnosed?

Technicians typically inspect the wiring and connectors for damage, test the lock solenoid coil for continuity, and use a scan tool to monitor the transfer case system.

5. Can I drive with the C0324 code on my GMC?

While the vehicle may still be drivable, you could experience issues with 4WD functionality, and itâ€™s best to address the problem promptly to avoid further damage.

6. How do I fix the C0324 code on a GMC vehicle?

Repairs may involve replacing the shorted lock solenoid, repairing damaged wiring, or reprogramming or replacing the transfer case control module.

7. How much does it cost to repair the C0324 code on a GMC?

The cost varies depending on the issue but can range from $100â€“$300 for wiring repairs or solenoid replacement, and more if the TCCM needs replacement.

8. Can a bad transfer case control module cause the C0324 code?

Yes, a faulty TCCM can cause the code if it fails to properly control the lock solenoid circuit.

9. How can I prevent the C0324 code from recurring?

Regularly inspect the transfer case system, including wiring and connectors, and address any moisture or corrosion issues promptly.

10. Do I need a professional mechanic to fix the C0324 code?

While some experienced DIYers may handle basic wiring repairs, diagnosing and fixing this code often requires specialized tools and expertise, so a professional mechanic is recommended.