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 noticed something unusual with the lock that keeps the fuel door closed. It's like when a door in your house doesn't close properly.
The vehicle's computer detects an issue with the performance or range of the fuel fill door lock control system.
The P04BC code is triggered when the Powertrain Control Module (PCM) detects a malfunction in the fuel fill door lock control system. This system is responsible for locking and unlocking the fuel door to prevent unauthorized access and ensure the fuel cap is secure.
• Fuel door does not lock or unlock
• Check engine light is on
• Unusual noises from the fuel door area
• Faulty fuel fill door lock actuator
• Wiring issues or poor electrical connections
• Faulty PCM or software issues
PCM: Powertrain Control Module
Actuator: A device that causes a mechanism to operate
• Inspect the fuel fill door lock actuator for damage.
• Check wiring and connections to the actuator.
• Use a diagnostic scanner to check for additional error codes.
• Replace the fuel fill door lock actuator if faulty.
• Repair or replace damaged wiring or connectors.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Screwdriver set
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect the fuel door lock mechanism.
• Keep electrical connections clean and secure.
• Avoid forcing the fuel door open or closed.
Control System Issue
• Check if the fuel door locks and unlocks properly.
• Listen for unusual noises when operating the fuel door.
• Have the vehicle inspected by a professional if the check engine light is on.
Repairs may be covered under the vehicle's basic warranty if the vehicle is still within the warranty period.
This code has been reported in vehicles with electronic fuel door locks, especially in models with high mileage or exposure to harsh conditions.
Moderate – While the vehicle can still be driven, the security of the fuel cap may be compromised.
Ensure the fuel door is properly secured to prevent fuel theft and potential safety hazards.
• Vehicle parked and engine off.
• Access to the fuel door area.
The fuel fill door lock actuator is typically located near the fuel door, inside the vehicle's body panel.
Q: Can I drive with a P04BC code?
A: Yes, but it's advisable to fix the issue to ensure the fuel door is secure.
Q: Will the check engine light turn off after repair?
A: Yes, the light should turn off after the issue is resolved and the code is cleared.
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Fitment Required · Vehicle-fitment part
Relevant for some EVAP leak codes where the fuel cap or sealing surface is part of the problem.
Some EVAP leak faults involve the fuel cap or its sealing surface.
Fuel caps vary by vehicle and should be matched to the exact application.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.