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 a problem with the power going to a pump that helps move the transmission fluid. It's like if a toy car's battery is too weak to make it go.
The P276B code indicates that the voltage supplied to the auxiliary transmission fluid pump B motor is lower than expected, which can affect the pump's operation.
This code is triggered when the Powertrain Control Module (PCM) detects a low voltage in the circuit that supplies power to the auxiliary transmission fluid pump B. This pump assists in circulating transmission fluid, especially in vehicles with start-stop systems or hybrid configurations.
• Check Engine Light is on
• Transmission overheating
• Poor transmission performance
• Faulty auxiliary transmission fluid pump B
• Wiring issues such as shorts or open circuits
• Defective PCM or transmission control module
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, second generation
• Use an OBD-II scanner to confirm the code.
• Inspect wiring and connectors for damage or corrosion.
• Test the auxiliary transmission fluid pump B for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty auxiliary transmission fluid pump B.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Toyota Prius
• Ford Fusion Hybrid
• Chevrolet Volt
• Regular maintenance and inspection of transmission components.
• Ensure proper electrical connections and voltage supply.
• Use recommended transmission fluid.
Electrical Circuit Issue
• Avoid driving the vehicle if the transmission is overheating.
• Consult a professional mechanic for diagnosis and repair.
Check with the vehicle manufacturer for warranty coverage on transmission components.
This code is more common in hybrid vehicles or those with start-stop systems where auxiliary pumps are used.
Moderate – Should be addressed soon to prevent further transmission issues.
Ignoring this code may lead to transmission damage and unsafe driving conditions.
• Vehicle at operating temperature
• Transmission fluid level correct
Typically located near the transmission or integrated into the transmission assembly.
Q: Can I drive with a P276B code?
A: It's not recommended to drive with this code as it may lead to transmission damage.
Q: How do I reset the P276B code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue persists, further diagnosis is needed.
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