P04BB — Fuel Fill Door Lock Control Circuit/Open

What Does P04BB Mean?

P04BB is a diagnostic trouble code indicating: Fuel Fill Door Lock Control Circuit/Open. This code relates to the emission controls system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of P04BB

⚠️ Check Engine Light (MIL) illuminated
⚠️ Erratic Fuel Fill Door Lock readings
⚠️ Related system operating intermittently
⚠️ Failed emissions test

Common Causes

🔍 Wiring issue in Fuel Fill Door Lock circuit (damaged, chafed, or corroded)
🔍 Faulty Fuel Fill Door Lock connector or terminal
🔍 Failed Fuel Fill Door Lock
🔍 ECM/PCM connection issue

Frequently Asked Questions

What does P04BB mean?

P04BB indicates: Fuel Fill Door Lock Control Circuit/Open. The vehicle's computer has detected that the Fuel Fill Door Lock is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P04BB?

Yes, P04BB is generally safe to drive with in the short term. However, it should still be addressed to pass emissions testing and prevent potential secondary issues.

How much does it cost to fix P04BB?

Repair costs for P04BB typically range from $80 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and repair Fuel Fill Door Lock wiring and connectors
🔧 Replace faulty Fuel Fill Door Lock

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P04BB: Fuel Fill Door Lock Control Circuit/Open