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 power supply for the pump that helps move the transmission fluid in your car. It's like when a toy's battery is low and it can't work properly.
The code indicates an issue with the power supply to the electric or auxiliary transmission fluid pump, which affects the pump's operation.
The P1AAB code is set when the vehicle's control module detects a malfunction in the power supply circuit for the electric or auxiliary transmission fluid pump. This pump is crucial for maintaining the proper flow and pressure of transmission fluid, which is essential for the transmission's operation.
• Transmission overheating
• Poor shifting performance
• Illuminated check engine light
• Faulty transmission fluid pump
• Damaged wiring or connectors
• Blown fuse or relay associated with the pump
Transmission Fluid: A lubricant that helps the transmission system function smoothly.
Power Supply: Provides electrical power to a component or system.
• Check for any blown fuses or relays related to the pump.
• Inspect wiring and connectors for damage or corrosion.
• Test the transmission fluid pump for proper operation.
• Replace any blown fuses or faulty relays.
• Repair or replace damaged wiring or connectors.
• Replace the transmission fluid pump if it is faulty.
• Multimeter
• OBD-II scanner
• Basic hand tools
$200 - $600
Moderate
• Chevrolet Volt
• Cadillac ELR
• Chevrolet Malibu Hybrid
• Regularly check and maintain transmission fluid levels.
• Inspect wiring and connectors during routine maintenance.
• Ensure the vehicle's electrical system is in good condition.
Electrical Issue
• Do not ignore the check engine light.
• Have the vehicle inspected by a professional if you notice transmission issues.
Check with your vehicle manufacturer; powertrain warranties may cover this issue.
This code is more common in hybrid and electric vehicles due to their reliance on electric pumps.
Moderate – Addressing this issue promptly can prevent further transmission damage.
Driving with a malfunctioning transmission pump can lead to unsafe driving conditions.
• Vehicle at operating temperature
• Transmission in drive
The electric/auxiliary transmission fluid pump is typically located near the transmission assembly.
Q: Can I drive with a P1AAB code?
A: It's not recommended to drive for long periods with this code, as it can lead to transmission damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspection of the transmission system can help prevent issues.
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