C0379 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 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 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?
- 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?
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 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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Information for Specific Makes
- C0379 Buick — Front Axle Switch Circuit
- C0379 Cadillac — Front Axle Switch Circuit
- C0379 Chevrolet — Front Axle Switch Circuit
- C0379 GMC — Front Axle Switch Circuit
- C0379 Oldsmobile — Front Axle System Malfunction
- C0379 Saab — Front Axle System Malfunction
Frequently Asked Questions about C0379 Code
1. What are common symptoms of OBDII code C0379 - Front Axle Switch Circuit?
The common symptoms include difficulty shifting between two-wheel drive and four-wheel drive modes, the vehicle getting stuck in one drive mode, and warning lights on the dashboard.
2. What are the possible causes of OBDII code C0379?
The code C0379 can be triggered by issues such as a faulty front axle switch, damaged wiring or connectors in the circuit, a defective transfer case control module, or a malfunctioning front axle actuator.
3. How can I diagnose the Front Axle Switch Circuit issue related to OBDII code C0379?
Diagnosing the issue involves checking the front axle switch for proper operation, inspecting the wiring and connectors for any damage, testing the front axle actuator, and scanning the transfer case control module for error codes.
4. How can I repair OBDII code C0379 - Front Axle Switch Circuit?
Repairing the code C0379 may involve replacing the front axle switch, repairing or replacing damaged wiring or connectors, replacing the front axle actuator if necessary, or reprogramming the transfer case control module.
5. Can I drive my vehicle with OBDII code C0379 present?
It is not recommended to drive the vehicle with the code C0379 active, as it can affect the proper functioning of the four-wheel drive system and potentially lead to further damage if left unresolved.
6. How much does it typically cost to repair OBDII code C0379?
The cost of repairing OBDII code C0379 can vary depending on the specific cause of the issue, but it may range from $200 to $600, including parts and labor.
7. Will resetting the OBDII system clear the C0379 code?
Resetting the OBDII system may temporarily clear the code C0379, but if the underlying issue is not addressed, the code is likely to reappear once the problem is detected again by the vehicle's system.
8. Can a DIY enthusiast fix OBDII code C0379 at home?
While some aspects of diagnosing and repairing OBDII code C0379 can be done by a knowledgeable DIY enthusiast, it is recommended to seek professional assistance, especially when dealing with electrical components and complex systems.
9. How long does it take to repair OBDII code C0379?
The repair time for OBDII code C0379 can vary depending on the exact cause of the issue and the extent of the repairs needed. In general, it may take a few hours to a full day to complete the repair.
10. Is it important to address OBDII code C0379 promptly?
Yes, it is essential to address OBDII code C0379 promptly to ensure the proper functioning of the four-wheel drive system and prevent potential safety hazards or further damage to the vehicle's components.
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