Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that locks the door where you put gas in. It might not be working because a wire is broken or something isn't connected right.
The P04BB code indicates that the vehicle's computer has detected an open circuit or malfunction in the fuel fill door lock control circuit.
The P04BB code is set when the Powertrain Control Module (PCM) detects an open circuit or fault in the circuit controlling the lock mechanism of the fuel fill door. This can prevent the door from locking or unlocking properly.
• Fuel fill door does not lock or unlock
• Warning light on the dashboard
• Possible security issues with fuel theft
• Faulty fuel fill door lock actuator
• Broken or damaged wiring in the circuit
• Faulty relay or fuse
• Corroded or loose electrical connectors
PCM: Powertrain Control Module, the computer that controls engine and transmission functions.
Actuator: A device that moves or controls a mechanism or system.
• Inspect the fuel fill door lock actuator for damage.
• Check the wiring and connectors for continuity and damage.
• Test the relay and fuse associated with the circuit.
• Use a multimeter to check for voltage at the actuator.
• Replace the faulty fuel fill door lock actuator.
• Repair or replace damaged wiring or connectors.
• Replace a blown fuse or faulty relay.
• Ensure all connections are secure and corrosion-free.
• Multimeter
• Screwdriver set
• Wire stripper and crimper
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect wiring and connectors for wear.
• Keep the fuel fill area clean and free of debris.
• Ensure the fuel fill door is used gently to prevent damage.
Circuit Issue
• Avoid forcing the fuel door if it doesn't open easily.
• Check for any dashboard warnings related to the fuel door.
Check with your vehicle manufacturer for warranty coverage on electrical components.
This code has been more common in vehicles with electronic fuel door locks as they age.
Moderate – While not immediately critical, it should be addressed to prevent security issues.
Ensure repairs are conducted by a qualified technician to prevent further electrical issues.
• Vehicle parked and engine off.
• Access to the fuel fill door and related components.
The fuel fill door lock actuator is typically located near the fuel filler neck, accessible from the rear fender area.
Q: Can I still drive my car with this code?
A: Yes, but it's best to fix it soon to avoid security risks with your fuel.
Q: Will this code affect my fuel economy?
A: No, this code does not impact fuel economy, but it affects the security of your fuel.
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