P0C20 Code - Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open
Quick Answer
The P0C20 diagnostic trouble code (DTC) refers to the Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open. Common causes include Faulty auxiliary transmission fluid pump, Damaged wiring or connectors in the pump circuit, Corrosion or poor connections in the circuit. 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
- P0C20 indicates Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open.
- Common causes
- Common causes include Faulty auxiliary transmission fluid pump, Damaged wiring or connectors in the pump circuit, Corrosion or poor connections in the circuit.
- 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 P0C20 Description
The P0C20 diagnostic trouble code (DTC) refers to the Auxiliary Transmission Fluid Pump Phase U-V-W Circuit/Open. This code indicates that there is an issue with the circuit or an open connection related to the auxiliary transmission fluid pump in the vehicle. The auxiliary transmission fluid pump plays a crucial role in maintaining proper fluid pressure and circulation within the transmission system. When this circuit is open or malfunctioning, it can lead to a variety of performance issues and potential long-term damage if left unaddressed.
Common Causes of P0C20
- Faulty auxiliary transmission fluid pump
- Damaged wiring or connectors in the pump circuit
- Corrosion or poor connections in the circuit
- Electrical issues such as blown fuses or relays
- Software glitches in the transmission control module
Symptoms of P0C20
- Harsh shifting between gears
- Delayed engagement when shifting
- Slipping gears during acceleration
- Transmission overheating
- Illumination of the check engine light
How to Fix P0C20
- Perform a comprehensive diagnostic scan to confirm the P0C20 code and pinpoint the exact location of the open circuit.
- Inspect the wiring, connectors, and components related to the auxiliary transmission fluid pump for any visible damage or corrosion.
- Test the auxiliary transmission fluid pump for proper operation and replace if necessary.
- Repair or replace any damaged wiring or connectors in the circuit.
- Clear the DTC and test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0C20
The typical repair costs for addressing the P0C20 code can vary depending on the extent of the issue and the specific components that require repair or replacement. In general, the cost of parts for a new auxiliary transmission fluid pump can range from $200 to $500, while the labor costs for the repair process can range from $150 to $300. Additional costs may apply if there are other related components that need attention. It is recommended to consult with a professional mechanic or auto repair shop to obtain a more accurate estimate based on the vehicle's make and model, as well as the local labor rates.
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