P04B7 — Fuel Fill Door Position Sensor/Switch Circuit Intermittent/Erratic

What Does P04B7 Mean?

P04B7 is a diagnostic trouble code indicating: Fuel Fill Door Position Sensor/Switch Circuit Intermittent/Erratic. 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 P04B7

⚠️ Check Engine Light (MIL) illuminated
⚠️ Fuel Fill Door Position Sensor/Switch signal cutting in and out
⚠️ Related system working sometimes but not consistently
⚠️ Failed emissions test

Common Causes

🔍 Loose or intermittent connection at Fuel Fill Door Position Sensor/Switch
🔍 Wire chafing causing intermittent contact
🔍 Fuel Fill Door Position Sensor/Switch failing under heat or vibration
🔍 Corroded connector pins with partial contact

Frequently Asked Questions

What does P04B7 mean?

P04B7 indicates: Fuel Fill Door Position Sensor/Switch Circuit Intermittent/Erratic. The vehicle's computer has detected that the Fuel Fill Door Position Sensor/Switch is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P04B7?

Yes, P04B7 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 P04B7?

Repair costs for P04B7 typically range from $30 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 reseat all Fuel Fill Door Position Sensor/Switch connectors
🔧 Repair chafed or damaged wiring in Fuel Fill Door Position Sensor/Switch circuit
🔧 Replace Fuel Fill Door Position Sensor/Switch if failing intermittently

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.

P04B7: Fuel Fill Door Position Sensor/Switch Circuit Intermittent/Erratic