Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected that the electric pump, which helps move the transmission fluid, is using too much power. It's like when a toy uses too much battery because something is making it work too hard.
The P0C28 code indicates that the electric or auxiliary transmission fluid pump is drawing more current than expected, which could mean it's working harder than it should be.
The P0C28 code is triggered when the Powertrain Control Module (PCM) detects an unusually high current draw in the electric or auxiliary transmission fluid pump A motor circuit. This can indicate a fault in the motor or an obstruction in the transmission fluid system causing the pump to work harder.
• Check Engine Light is on
• Transmission overheating
• Poor transmission performance
• Faulty transmission fluid pump
• Obstruction in the transmission fluid lines
• Electrical short or wiring issues
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Check for any stored codes and freeze frame data
• Inspect the wiring and connectors for damage
• Test the transmission fluid pump for proper operation
• Replace the faulty transmission fluid pump
• Clear obstructions in the fluid lines
• Repair or replace damaged wiring
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Toyota Prius
• Chevrolet Volt
• Ford Fusion Hybrid
• Regular maintenance of transmission fluid
• Inspect wiring for wear and tear
• Ensure proper fluid levels
Electrical Issue
• Do not ignore the Check Engine Light
• Consult a professional mechanic
• Avoid driving long distances until fixed
Check with your vehicle manufacturer for warranty coverage on transmission components.
This code has been associated with hybrid and electric vehicles where auxiliary pumps are used to maintain transmission fluid pressure.
Moderate – It should be addressed soon to prevent transmission damage.
Driving with a malfunctioning transmission pump can lead to further damage and safety issues. Always ensure repairs are done by a qualified technician.
• Vehicle at operating temperature
• Transmission in neutral or park
The electric transmission fluid pump is typically located near the transmission assembly, often on the side or bottom of the vehicle.
Q: Can I drive with a P0C28 code?
A: It's not recommended to drive for extended periods as it may cause further damage.
Q: How do I reset the P0C28 code?
A: Use an OBD-II scanner to clear the code, but ensure the issue is fixed first.
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