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 found a problem with the electrical circuit that controls a part of the fuel pump. It's like a switch that isn't working right, so the fuel pump might not get the power it needs.
The P027A code indicates that there is an issue with the control circuit of the secondary fuel pump module, which may be open or disconnected.
The P027A code is triggered when the Engine Control Module (ECM) detects an open circuit or a malfunction in the control circuit of the secondary fuel pump module. This can affect the fuel delivery to the engine, potentially leading to performance issues.
• Engine may not start
• Reduced engine performance
• Check Engine Light illuminated
• Faulty fuel pump module B
• Open or shorted wiring in the fuel pump circuit
• Poor electrical connection at the fuel pump module
ECM: Engine Control Module
OBD-II: On-Board Diagnostics, a standardized system for vehicle self-diagnosis
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the fuel pump module B for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the fuel pump module B if faulty.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regularly inspect and maintain fuel system components.
• Ensure electrical connections are secure and free of corrosion.
• Use quality fuel to prevent clogging and wear.
Fuel System Issue
• Do not ignore the Check Engine Light.
• Consult a professional mechanic if unsure about repairs.
Check with the vehicle manufacturer for warranty coverage on fuel system components.
This code has been reported in vehicles with higher mileage or those that have experienced electrical issues.
Moderate – This issue can lead to performance problems and should be addressed promptly.
Driving with a malfunctioning fuel system can be dangerous. Address the issue to ensure vehicle safety.
• Vehicle at operating temperature
• Fuel system pressure within specifications
The fuel pump module B is typically located in the fuel tank or along the fuel line.
Q: Can I drive with a P027A code?
A: It's not recommended, as it can lead to performance issues and potential safety hazards.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspections of the fuel system can help prevent this issue.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
View on Amazon
Universal · Wire connectors and repair kit
Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.