P0979 2016 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 2016 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 2016 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0979 2016 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 2016 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 2016 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 2016 Chevrolet Silverado Code
1. What does the OBDII code P0979 mean on a 2016 Chevrolet Silverado?
P0979 indicates a "Shift Solenoid Valve 3 Control Circuit Low Voltage," meaning the vehicle's transmission control module (TCM) has detected low voltage in the circuit controlling shift solenoid 3.
2. What are the common symptoms of code P0979 on a 2016 Chevrolet Silverado?
Common symptoms include harsh or delayed shifting, failure to shift into certain gears, transmission overheating, or the vehicle entering limp mode.
3. What causes the P0979 code to appear on a Chevrolet Silverado?
Possible causes include a faulty shift solenoid, damaged wiring or connectors in the solenoid circuit, a malfunctioning TCM, or low transmission fluid.
4. Can low transmission fluid cause the P0979 code?
Yes, low transmission fluid can affect solenoid operation and cause the P0979 code to trigger.
5. How is the P0979 code diagnosed?
A mechanic will scan for additional codes, inspect wiring and connectors for damage, test the shift solenoid's resistance, and check the TCM for proper function.
6. Can I drive my 2016 Chevrolet Silverado with the P0979 code?
Driving with this code is not recommended, as it can lead to further transmission damage or unsafe driving conditions.
7. How do you fix the P0979 code on a Chevrolet Silverado?
Repairs may include replacing the faulty shift solenoid, repairing or replacing damaged wiring, cleaning or reconnecting corroded connectors, or reprogramming or replacing the TCM.
8. How much does it cost to fix the P0979 code on a 2016 Silverado?
Repair costs vary but may range from $150 to $400 for solenoid replacement, depending on parts and labor. Wiring or TCM repairs may cost more.
9. Can a dead battery cause the P0979 code to appear?
A dead or weak battery is unlikely to cause this specific code but may contribute to electrical issues if other symptoms are present.
10. How can I prevent the P0979 code from returning?
Regularly inspect the transmission system, maintain proper fluid levels, and address electrical issues promptly to prevent recurrence.
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