Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the electric pump that helps move the transmission fluid in your car. It might not be getting power or there's a broken wire.
The P0C23 code is triggered when the transmission control module detects an issue with the circuit controlling the electric or auxiliary transmission fluid pump.
The electric/auxiliary transmission fluid pump is responsible for circulating transmission fluid through the transmission system to ensure proper lubrication and cooling. The control module monitors the pump's operation and the electrical circuit. An open circuit or fault in the wiring or connections can trigger this code.
• Check Engine Light illuminated
• Transmission overheating
• Poor transmission performance
• Unusual noises from the transmission
• Faulty electric/auxiliary transmission fluid pump
• Open or shorted wiring in the pump circuit
• Faulty transmission control module
• Corroded or damaged electrical connectors
Transmission: A system in a vehicle that transmits power from the engine to the wheels.
Control Module: An electronic device that manages various functions in a vehicle.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the electric/auxiliary transmission fluid pump for proper operation.
• Check the transmission control module for faults.
• Repair or replace damaged wiring or connectors.
• Replace the faulty electric/auxiliary transmission fluid pump.
• Replace or reprogram the transmission control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Toyota Prius
• Chevrolet Volt
• Ford Fusion Hybrid
• Regularly inspect and maintain transmission fluid levels.
• Check for corrosion or damage in electrical connectors.
• Schedule routine transmission maintenance.
Electrical Circuit Issue
• Do not ignore the Check Engine Light.
• Get the vehicle inspected by a professional if unsure.
• Avoid driving the vehicle if transmission issues are severe.
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with hybrid and electric vehicles that rely on electric pumps for transmission fluid circulation.
Moderate – Address the issue to prevent potential transmission damage.
Ignoring this code can lead to transmission failure, which may result in unsafe driving conditions.
• Vehicle must be running.
• Transmission fluid at operating temperature.
The electric/auxiliary transmission fluid pump is typically located near the transmission housing.
Q: Can I drive with a P0C23 code?
A: It's not recommended as it could lead to transmission damage.
Q: How do I clear a P0C23 code?
A: Fix the underlying issue and use an OBD-II scanner to clear the code.
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