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 electricity going to a part of the transmission that helps pump the fluid. It's like when a toy doesn't work because the batteries are too strong.
The P276C code indicates that the voltage in the circuit supplying the auxiliary transmission fluid pump B motor is higher than expected.
The transmission fluid pump B is an electric or auxiliary pump that helps circulate transmission fluid. The powertrain control module (PCM) monitors the voltage and current supply to this pump. If it detects a voltage level that is higher than the expected range, it triggers the P276C code.
• Check Engine Light is on
• Transmission may not shift properly
• Unusual noises from the transmission
• Faulty electric/auxiliary transmission fluid pump B
• Wiring issues such as shorts or open circuits
• Faulty PCM or a software issue
PCM: Powertrain Control Module, the computer that controls the engine and transmission.
Transmission Fluid Pump: A pump that circulates fluid within the transmission to ensure proper operation.
• Use an OBD-II scanner to confirm the code.
• Inspect wiring and connectors for damage or corrosion.
• Test the voltage supply to the transmission fluid pump B.
• Repair or replace damaged wiring or connectors.
• Replace the electric/auxiliary transmission fluid pump B if faulty.
• Update or reprogram the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance of the transmission system
• Check wiring and connectors for damage periodically
• Ensure software updates for the PCM are applied
Electrical Circuit Issue
• Do not ignore the check engine light.
• Have the vehicle inspected by a professional if you notice shifting issues.
Repairs may be covered under the powertrain warranty if the vehicle is still within the warranty period.
This code has been more common in vehicles with complex transmission systems that rely heavily on electronic components.
Moderate – While the vehicle may still be drivable, it is important to address the issue to prevent further transmission damage.
Driving with a malfunctioning transmission can lead to safety issues. Always ensure your vehicle is in proper working condition.
• Vehicle at operating temperature
• Transmission in drive mode
The auxiliary transmission fluid pump B is typically located near the transmission assembly, often on the side or bottom.
Q: Can I drive with a P276C code?
A: It's possible to drive short distances, but it's not recommended as it may lead to further damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspections of the transmission system can help prevent this issue.
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