C0379 Buick Code - Front Axle Switch Circuit
Quick Answer
The front axle control circuit consists of an electric motor actuator that engages and disengages the front axle. Common causes include Faulty Front Axle Engagement Actuator, Front Axle Engagement Actuator harness is open or shorted, Front Axle Engagement Actuator 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
- C0379 Buick indicates Front Axle Switch Circuit.
- Common causes
- Common causes include Faulty Front Axle Engagement Actuator, Front Axle Engagement Actuator harness is open or shorted, Front Axle Engagement Actuator 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.
Code C0379 Buick Description
The front axle engagement actuator contains the following circuits: A Run/Crank Ignition 1 Voltage circuit, a Four-Wheel Drive Wheel Lock Indicator circuit, a Front Axle Actuator Control circuit, and a ground circuit.
When a shift to 4WD Auto, 4WD High, or 4WD Low is requested, the Transfer Case Control Module engages the front axle by grounding the front axle actuator control circuit through a current limiting driver.
This Diagnostic Trouble Code (DTC) will be set when a short to ground, short to voltage, or open circuit is detected.
What are the Possible Causes of the DTC C0379 Buick?
- Faulty Front Axle Engagement Actuator
- Front Axle Engagement Actuator harness is open or shorted
- Front Axle Engagement Actuator circuit poor electrical connection
- Faulty Transfer Case Control Module
How to Fix the DTC C0379 Buick?
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 C0379 Buick 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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Frequently Asked Questions about C0379 Buick Code
1. What does the OBDII code C0379 on a Buick mean?
C0379 indicates an issue with the Front Axle Switch Circuit, which is part of the vehicle's all-wheel-drive or four-wheel-drive system.
2. What are common symptoms of code C0379 on a Buick?
Symptoms may include the AWD or 4WD system not engaging, a warning light on the dashboard, or reduced traction in slippery conditions.
3. What causes code C0379 on a Buick?
Common causes include a faulty front axle switch, damaged wiring or connectors, or an issue with the transfer case control module.
4. Can driving with code C0379 damage my Buick?
Driving with this code may result in reduced traction or AWD/4WD functionality, especially in adverse road conditions, but it typically won't cause immediate damage to other components.
5. How do I diagnose code C0379 on my Buick?
Start by inspecting the front axle switch, wiring harness, and connectors for damage. Use a multimeter to test the circuit and check for electrical continuity.
6. How can I fix code C0379 on a Buick?
Repairs may include replacing the front axle switch, repairing damaged wiring, or reprogramming or replacing the transfer case control module.
7. Is code C0379 specific to certain Buick models?
Code C0379 commonly appears in Buick models equipped with AWD or 4WD systems, such as the Buick Enclave or Buick Regal.
8. How much does it cost to fix code C0379 on a Buick?
Repair costs can vary widely, ranging from $100 for simple wiring repairs to $500 or more for component replacement, depending on labor and parts.
9. Can a loose connection cause code C0379 on a Buick?
Yes, a loose or corroded connection in the front axle switch circuit can trigger this code.
10. Do I need specialized tools to fix code C0379 on my Buick?
Basic tools like a multimeter and a diagnostic scanner are usually sufficient for troubleshooting and repairs related to this code.
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