P0979 2015 Chevrolet Silverado Code - Shift Solenoid Valve 3 Control Circuit Low Voltage
Quick Answer
The Transmission Control Module (TCM) high side driver 1 supplies 12 V to pressure control solenoid valve 3. Common causes include Faulty Shift Solenoid Valve 3, Shift Solenoid Valve 3 harness is open or shorted, Shift Solenoid Valve 3 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
- P0979 2015 Chevrolet Silverado indicates Shift Solenoid Valve 3 Control Circuit Low Voltage.
- Common causes
- Common causes include Faulty Shift Solenoid Valve 3, Shift Solenoid Valve 3 harness is open or shorted, Shift Solenoid Valve 3 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 P0979 2015 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0979 2015 Chevrolet Silverado?
- Faulty Shift Solenoid Valve 3
- Shift Solenoid Valve 3 harness is open or shorted
- Shift Solenoid Valve 3 circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
How to Fix the DTC P0979 2015 Chevrolet Silverado?
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 P0979 2015 Chevrolet Silverado 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 P0979 2015 Chevrolet Silverado Code
1. What does the OBDII code P0979 mean on a 2015 Chevrolet Silverado?
P0979 indicates a low voltage issue in the control circuit for Shift Solenoid Valve 3, which is part of the transmission's control system.
2. What are the symptoms of code P0979 on a 2015 Chevrolet Silverado?
Common symptoms include transmission shifting problems, harsh or delayed shifts, the vehicle stuck in a specific gear, and the check engine light turning on.
3. What causes the P0979 code to appear on a 2015 Chevrolet Silverado?
Potential causes include a faulty shift solenoid valve, damaged wiring or connectors in the circuit, a failed transmission control module (TCM), or low transmission fluid levels.
4. How can I diagnose the P0979 code on my 2015 Chevrolet Silverado?
Start by checking the transmission fluid level and condition, inspecting the wiring and connectors for damage, and testing the Shift Solenoid Valve 3 circuit for proper voltage and continuity.
5. Can I drive my 2015 Chevrolet Silverado with the P0979 code?
Driving with this code is not recommended, as it can lead to further transmission damage and unsafe driving conditions due to improper shifting.
6. How do I fix the P0979 code on a 2015 Chevrolet Silverado?
Repairs may include replacing the faulty shift solenoid, repairing or replacing damaged wiring/connectors, or reprogramming or replacing the TCM if necessary.
7. How much does it cost to fix the P0979 code on a 2015 Chevrolet Silverado?
Repair costs vary, but replacing a shift solenoid typically costs between $150 and $400, while wiring repairs or TCM replacement can range higher depending on labor and parts.
8. Can low transmission fluid cause the P0979 code on a 2015 Chevrolet Silverado?
Yes, low or contaminated transmission fluid can affect solenoid function and lead to this code. Always ensure the fluid level and condition are correct.
9. How can I prevent the P0979 code from recurring on my 2015 Chevrolet Silverado?
Regularly maintain the transmission by checking fluid levels, inspecting wiring for damage, and addressing any shifting issues promptly.
10. Do I need a professional mechanic to fix the P0979 code on my 2015 Chevrolet Silverado?
While some basic diagnostics like checking fluid levels can be done at home, repairing the solenoid or wiring issues often requires professional tools and expertise.
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