Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is saying that there's a problem with the wires or signals that control one of the fuel pumps. It's like a light switch not working because the wires are loose or broken.
The code P027C indicates that the vehicle's computer has detected a low voltage condition in the control circuit for the secondary fuel pump module.
The P027C code is triggered when the Powertrain Control Module (PCM) detects a low voltage condition in the control circuit of the secondary fuel pump module, often referred to as Fuel Pump Module B. This could be due to issues such as a faulty fuel pump relay, wiring problems, or a defective fuel pump module.
• Engine may not start
• Engine stalls
• Reduced engine performance
• Faulty fuel pump module
• Poor electrical connection in the fuel pump circuit
• Damaged wiring or connectors
PCM: Powertrain Control Module, the computer that controls engine and transmission functions.
OBD-II: On-Board Diagnostics, a standardized system for self-diagnostics in vehicles.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Check the fuel pump relay and fuse.
• Repair or replace damaged wiring or connectors.
• Replace the faulty fuel pump module.
• Replace the fuel pump relay if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $700
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect and maintain fuel system components.
• Ensure electrical connections are secure and free from corrosion.
• Replace fuel filters as recommended by the manufacturer.
Fuel System Issue
• Do not ignore the check engine light.
• Have a professional diagnose and repair the issue.
• Avoid driving the vehicle if it stalls frequently.
Check with your vehicle manufacturer or warranty provider for coverage on fuel system components.
This code has been associated with electrical issues in the fuel system, often due to aging or wear in wiring and connectors.
Moderate – The vehicle may still operate, but performance issues or stalling can occur.
Driving with a malfunctioning fuel system can lead to safety hazards. It is important to address this issue promptly.
• Engine running
• Fuel pump circuit under load
The fuel pump module is typically located in or near the fuel tank.
Q: Can I drive with a P027C code?
A: It's not recommended to drive with this code as it can lead to engine stalling or performance issues.
Q: How do I clear a P027C code?
A: After repairing the issue, use an OBD-II scanner to clear the code. If the problem persists, the code may return.
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