P04B3: Refueling Vapor Control Valve Stuck Performance/Stuck Open
Methodology: We combine code standards with complaint and reliability patterns, then review for clear, vehicle-first diagnosis steps.
Sources: SAE/OBD-II definitions, manufacturer service information, and public reliability reports (including NHTSA where applicable).
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
What Does P04B3 Mean?
P04B3 is a diagnostic trouble code indicating: Refueling Vapor Control Valve Stuck Performance/Stuck 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 P04B3
- ⚠️ Check Engine Light (MIL) illuminated
- ⚠️ Refueling Vapor Control Valve Stuck not meeting expected output
- ⚠️ Degraded performance of related system
- ⚠️ Failed emissions test
Common Causes
- 🔍 Refueling Vapor Control Valve Stuck degraded from age or contamination
- 🔍 Mechanical wear in Refueling Vapor Control Valve Stuck or related parts
- 🔍 Restriction or blockage affecting Refueling Vapor Control Valve Stuck
- 🔍 Calibration drift in Refueling Vapor Control Valve Stuck
Frequently Asked Questions
What does P04B3 mean?
Can I drive with code P04B3?
How much does it cost to fix P04B3?
What To Do Next
Possible Fixes
- 🔧 Inspect Refueling Vapor Control Valve Stuck for contamination or wear
- 🔧 Replace Refueling Vapor Control Valve Stuck
- 🔧 Address any related mechanical faults
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.