P0978 Code - Shift Solenoid 'C' Control Circuit Range/Performance
Quick Answer
The P0978 diagnostic trouble code indicates an issue with the Shift Solenoid 'C' Control Circuit Range/Performance. Common causes include Faulty shift solenoid 'C', Damaged wiring or connectors in the circuit, Malfunctioning PCM. 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
- P0978 indicates Shift Solenoid 'C' Control Circuit Range/Performance.
- Common causes
- Common causes include Faulty shift solenoid 'C', Damaged wiring or connectors in the circuit, Malfunctioning PCM.
- 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 P0978 Description
The P0978 diagnostic trouble code indicates an issue with the Shift Solenoid 'C' Control Circuit Range/Performance. This code is typically triggered when the powertrain control module (PCM) detects a discrepancy in the performance of the shift solenoid 'C' circuit. The shift solenoid 'C' is responsible for controlling the hydraulic pressure in the transmission, which in turn controls the shifting of gears. When this solenoid malfunctions or operates outside of the expected range, it can lead to various transmission-related issues.
Common Causes of P0978
- Faulty shift solenoid 'C'
- Damaged wiring or connectors in the circuit
- Malfunctioning PCM
- Low transmission fluid levels
- Electrical issues or shorts in the circuit
Symptoms of P0978
- Erratic shifting behavior
- Harsh or delayed shifting
- Inability to shift gears
- Poor acceleration
- Reduced fuel efficiency
How to Fix P0978
- Diagnose the issue by using a scan tool to retrieve the trouble codes and perform a visual inspection of the shift solenoid 'C' circuit.
- Test the shift solenoid 'C' for proper operation and resistance using a multimeter.
- Inspect the wiring and connectors in the circuit for any damage or corrosion, repairing or replacing as necessary.
- Check transmission fluid levels and quality, topping off or replacing fluid if needed.
- Clear the trouble codes and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0978
The cost of repairing a Shift Solenoid 'C' Control Circuit Range/Performance issue can vary depending on the specific cause of the problem and the labor rates in your area. Typically, the cost of replacing a shift solenoid 'C' can range from $150 to $300, while addressing wiring or connector issues may cost between $100 and $200. Additional costs for diagnostic time, transmission fluid replacement, and labor can also factor into the overall repair expenses. It is recommended to consult with a qualified mechanic to obtain a more accurate cost estimate based on your vehicle's make and model.
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Code P0978 Information for Specific Makes
- P0978 Dodge — Shift Solenoid 'C' Control Circuit Range/Performance
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