What are the common causes of P04BC?

A fuel door lock actuator that does not reach its commanded position. A binding fuel door lock mechanism. A failing fuel door lock actuator. A faulty body control module.

Command the fuel door lock through its range on a scan tool. Inspect the fuel door lock mechanism for binding. Test the fuel door lock actuator travel. Replace the fuel door lock actuator if it does not reach position. Clear the code and retest.

P04BC

Fuel Fill Door Lock Control Range/Performance

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

What it means

P04BC means Fuel Fill Door Lock Control Range/Performance.

Check these first

A fuel door lock actuator that does not reach its commanded position
A binding fuel door lock mechanism
A failing fuel door lock actuator
A faulty body control module

What to do next

Command the fuel door lock through its range on a scan tool
Inspect the fuel door lock mechanism for binding
Test the fuel door lock actuator travel
Replace the fuel door lock actuator if it does not reach position
Clear the code and retest

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Updated

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