P0979 Buick Code - Shift Solenoid 'C' Control Circuit Low
Quick Answer
The P0979 Buick code refers to a Shift Solenoid 'C' Control Circuit Low. Common causes include Faulty shift solenoid 'C', Damaged or corroded wiring in the solenoid circuit, Defective transmission control module. 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 Buick indicates Shift Solenoid 'C' Control Circuit Low.
- Common causes
- Common causes include Faulty shift solenoid 'C', Damaged or corroded wiring in the solenoid circuit, Defective transmission control module.
- 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 Buick Description
The P0979 Buick code refers to a Shift Solenoid 'C' Control Circuit Low. In an automatic transmission system, shift solenoids are responsible for controlling the flow of transmission fluid, which in turn controls the shifting of gears. Solenoid 'C' specifically plays a crucial role in the operation of the transmission, ensuring smooth and timely gear changes. When the control circuit for this solenoid is detected to be operating at a lower voltage than expected, the P0979 code is triggered.
Common Causes of P0979 Buick
- Faulty shift solenoid 'C'
- Damaged or corroded wiring in the solenoid circuit
- Defective transmission control module
- Low battery voltage affecting the circuit
- Poor electrical connections
Symptoms of P0979 Buick
- Harsh or delayed shifting
- Transmission slipping
- Inability to shift gears
- Illuminated check engine light
- Decreased fuel efficiency
How to Fix P0979 Buick
- Diagnose the issue with a scan tool to confirm the P0979 code and pinpoint the exact cause of the low voltage in the shift solenoid 'C' circuit.
- Inspect the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the shift solenoid 'C' for proper operation and replace if found to be faulty.
- Check the transmission control module for any signs of malfunction and replace if needed.
- Clear the diagnostic trouble codes, reset the transmission adaptations, and road test the vehicle to ensure proper shifting functionality.
Cost to Fix P0979 Buick
The typical repair costs for addressing a P0979 Buick code can vary depending on the specific cause of the issue and the labor rates in your area. On average, replacing a shift solenoid 'C' can cost between $150 to $300, including both parts and labor. However, if additional components like the transmission control module need to be replaced, the cost can increase significantly. It's recommended to consult with a professional mechanic or auto repair shop for a more accurate estimate based on your vehicle's make and model. Keep in mind that diagnostic time and labor rates can also impact the overall cost of the repair.
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