P04B4
Refueling Vapor Control Valve Stuck Closed
P04B4 is an OBD-II diagnostic trouble code meaning: Refueling Vapor Control Valve Stuck Closed. Common causes: fuel vapor control valve jammed, open or shorted valve wiring harness. Estimated repair cost: $56–167.
Symptoms
- Difficulty starting the engine
- Increased fuel consumption
- Smell of gasoline in the cabin
- Check Engine Light Is On
Causes
- Fuel vapor control valve jammed
- Open or shorted valve wiring harness
- Engine control unit malfunction
- Valve contamination
How to Fix
- Check the fuel vapor control valve for jamming
- Check wiring harness and valve connectors
- Clean or replace valve if necessary
- Reset the error and check the operation of the EVAP system
Related codes
Error P04B4 by Vehicle Brand
FAQ
What does the P04B4 code mean?
P04B4 is an OBD-II diagnostic trouble code that indicates: Refueling Vapor Control Valve Stuck Closed
What causes a P04B4 error code?
The most common causes of P04B4 include: Fuel vapor control valve jammed; Open or shorted valve wiring harness; Engine control unit malfunction; Valve contamination.
How do I fix a P04B4 diagnostic trouble code?
To fix P04B4: Check the fuel vapor control valve for jamming. Check wiring harness and valve connectors. Clean or replace valve if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P04B4?
Limited driving only, diagnose soon
How much does it cost to fix P04B4?
The estimated repair cost for P04B4 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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