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 too much electricity is going through a part of the motor that helps pump the transmission fluid. It's like when a toy uses too much battery power and gets too hot.
The P0B05 code is triggered when the current in the Phase V circuit of the electric or auxiliary transmission fluid pump motor is higher than expected.
The electric or auxiliary transmission fluid pump is responsible for maintaining the fluid pressure in the transmission system, especially in hybrid or electric vehicles. The pump motor has several phases, and each phase is monitored for electrical current. If the Phase V current exceeds the manufacturer's specified range, the P0B05 code is set. This could indicate a short circuit, excessive load, or a fault in the motor or its control circuitry.
• Warning light on the dashboard
• Reduced fuel efficiency
• Transmission overheating
• Short circuit in the pump motor
• Faulty transmission fluid pump motor
• Wiring issues or damaged connectors
Transmission: A system in a vehicle that transfers power from the engine to the wheels.
Current: The flow of electricity through a circuit.
• Check for any other related codes
• Inspect the wiring and connectors for damage
• Test the transmission fluid pump motor for proper operation
• Repair or replace damaged wiring or connectors
• Replace the transmission fluid pump motor if faulty
• Clear the codes and test drive the vehicle to ensure the issue is resolved
• OBD-II scanner
• Multimeter
• Basic hand tools
$300 - $800
Moderate
• Toyota Prius
• Chevrolet Volt
• Ford Fusion Hybrid
• Regular maintenance of the transmission system
• Ensure proper fluid levels and quality
• Inspect wiring and connectors periodically
Electrical Issue
• Do not ignore the warning light; get it checked soon.
• Avoid driving aggressively until the issue is fixed.
Check vehicle warranty for coverage on hybrid or electric components.
This code is more common in hybrid and electric vehicles due to their reliance on electric pumps.
Moderate – Should be addressed soon to avoid potential transmission damage.
Driving with this code can lead to transmission damage, which may not be covered under warranty if neglected.
• Vehicle at operating temperature
• Transmission under load
The electric transmission fluid pump is typically located near the transmission assembly.
Q: Can I drive with a P0B05 code?
A: It's not recommended to drive for long periods with this code, as it may lead to transmission damage.
Q: What happens if I ignore this code?
A: Ignoring this code can result in reduced transmission performance and potential damage.
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