What are the common causes of P04BB?

An open in the fuel door lock control circuit. A failed fuel door lock actuator. Corroded fuel door lock wiring. A faulty body control module driver.

Command the fuel door lock with a scan tool and listen for the actuator. Check the fuel door lock control circuit for an open. Measure the fuel door lock actuator resistance. Replace the fuel door lock actuator if the circuit is good. Clear the code and retest.

P04BB

Fuel Fill Door Lock Control Circuit/Open

System: Auxiliary emission controls (P code)
Lamp: Check Engine Light
Category: Powertrain - Auxiliary Emissions Controls

What it means

P04BB means Fuel Fill Door Lock Control Circuit/Open.

Check these first

An open in the fuel door lock control circuit
A failed fuel door lock actuator
Corroded fuel door lock wiring
A faulty body control module driver

What to do next

Command the fuel door lock with a scan tool and listen for the actuator
Check the fuel door lock control circuit for an open
Measure the fuel door lock actuator resistance
Replace the fuel door lock actuator if the circuit is good
Clear the code and retest

Look up another code

Code or symptom

Enter a full code or a symptom. Press / to search. How to read a code

Type a code above, or start from a symptom or a common code.

Updated

Generic SAE J2012 definition. Last updated 2026-10-10.