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 found a problem with the part that helps pump the transmission fluid. It's like if a pump that moves water in a fountain isn't working right.
The P0C29 code indicates an issue with the performance of the driver circuit for the electric or auxiliary transmission fluid pump A. This circuit is responsible for controlling the operation of the pump.
The P0C29 code is triggered when the powertrain control module (PCM) detects a performance issue in the driver circuit of the electric or auxiliary transmission fluid pump A. This could be due to electrical faults, such as open or short circuits, or mechanical issues within the pump itself.
• Check Engine Light illuminated
• Transmission overheating
• Reduced fuel efficiency
• Faulty electric/auxiliary transmission fluid pump
• Damaged wiring or connectors in the pump circuit
• Faulty powertrain control module (PCM)
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics II
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the transmission fluid pump for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the electric/auxiliary transmission fluid pump if faulty.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Ford Fusion Hybrid
• Regular maintenance of the transmission system
• Ensure proper fluid levels
• Inspect wiring and connectors periodically
Circuit Performance Issue
• Avoid driving the vehicle until the issue is resolved.
• Consult a professional mechanic for diagnosis and repair.
Check your vehicle's warranty coverage for transmission components.
This code has become more common with the increased use of electric and hybrid vehicles, which rely on electric pumps for transmission fluid circulation.
Moderate – It is recommended to address this issue soon to prevent further transmission damage.
Ignoring this code can lead to transmission failure, which may pose a safety risk.
• Vehicle at operating temperature
• Transmission fluid at correct level
The electric/auxiliary transmission fluid pump is typically located near the transmission housing.
Q: Can I drive with a P0C29 code?
A: It's not recommended to drive with this code as it can lead to further damage to the transmission.
Q: How can I prevent a P0C29 code?
A: Regular maintenance and inspections of the transmission system can help prevent this code.
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