P0979 2014 GMC Sierra Code - Shift Solenoid Valve 3 Control Circuit Low Voltage
Quick Answer
The P0979 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Shift Solenoid Valve 3 Control Circuit experiencing low voltage. Common causes include Faulty Shift Solenoid Valve 3, Wiring issues in the control circuit, Corrosion or poor connections in the electrical system. 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
- P0979 2014 GMC Sierra indicates Shift Solenoid Valve 3 Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty Shift Solenoid Valve 3, Wiring issues in the control circuit, Corrosion or poor connections in the electrical system.
- 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 P0979 2014 GMC Sierra Description
The P0979 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Shift Solenoid Valve 3 Control Circuit experiencing low voltage. The shift solenoid valve is a crucial component of the transmission system, responsible for controlling the flow of transmission fluid to engage or disengage specific gears. In this case, the low voltage detected in the control circuit for Shift Solenoid Valve 3 suggests a potential issue with the electrical system that controls this solenoid.
Common Causes of P0979 2014 GMC Sierra
- Faulty Shift Solenoid Valve 3
- Wiring issues in the control circuit
- Corrosion or poor connections in the electrical system
- Low transmission fluid levels
- Internal transmission problems
Symptoms of P0979 2014 GMC Sierra
- Harsh shifting between gears
- Delayed engagement when shifting gears
- Transmission slipping
- Stuck in a particular gear
- Check Engine Light illuminated on the dashboard
How to Fix P0979 2014 GMC Sierra
- Use a scan tool to diagnose the specific cause of the P0979 code.
- Inspect the wiring harness and connectors for any damage or corrosion. Repair or replace as necessary.
- Test the Shift Solenoid Valve 3 for proper operation and replace if faulty.
- Check the transmission fluid level and condition. Top up or perform a fluid flush if needed.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0979 2014 GMC Sierra
The cost estimate for repairing a Shift Solenoid Valve 3 Control Circuit Low Voltage issue can vary depending on the specific cause of the problem and the extent of the repair needed. Generally, the cost for parts such as a new Shift Solenoid Valve 3 can range from $50 to $150, while labor costs may range from $100 to $300 depending on the shop rates and the complexity of the repair. Overall, the total repair cost for addressing a P0979 code in a 2014 GMC Sierra can range from $150 to $450. It is advisable to consult with a professional mechanic or auto repair shop for a more accurate cost estimate based on your specific situation.
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Frequently Asked Questions about P0979 2014 GMC Sierra Code
1. What does OBDII code P0979 mean on a 2014 GMC Sierra?
Code P0979 indicates a low voltage issue in the control circuit for Shift Solenoid Valve 3, which is part of the transmission control system.
2. What are the common symptoms of code P0979 in a 2014 GMC Sierra?
Symptoms may include harsh or delayed shifting, being stuck in a specific gear, transmission slippage, or the Check Engine Light turning on.
3. What causes the P0979 code to appear?
Common causes include a faulty shift solenoid, damaged or corroded wiring, a bad transmission control module (TCM), or low transmission fluid.
4. Can low transmission fluid cause code P0979?
Yes, low or contaminated transmission fluid can affect solenoid operation and trigger the P0979 code.
5. How do you diagnose a P0979 code on a 2014 GMC Sierra?
A technician will check the transmission fluid level, inspect wiring and connectors for damage or corrosion, test the shift solenoid, and check for proper voltage in the circuit.
6. Can you drive with a P0979 code active?
Driving is possible but not recommended, as it can cause further damage to the transmission and lead to unsafe driving conditions.
7. How is the P0979 code repaired on a 2014 GMC Sierra?
Repairs may include replacing the shift solenoid, repairing or replacing damaged wiring or connectors, or updating/replacing the TCM if necessary.
8. How much does it cost to fix a P0979 code on a GMC Sierra?
The cost varies, but replacing a shift solenoid typically ranges from $150 to $400, depending on labor and part costs.
9. Can a P0979 code clear itself?
The code may clear temporarily after fixing the issue, but it usually requires resetting with an OBDII scanner after repairs are completed.
10. How can I prevent code P0979 from occurring again?
Regularly check and maintain proper transmission fluid levels, inspect wiring and connectors for damage, and address transmission issues promptly.
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