P04B1
Generic code
Free on OBD DashX
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See which problems come with P04B1, how often it shows up in other vehicles, and how to fix it — step by step.
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- How often it happens
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What P04B1 means
- Refueling Vapor Control Valve Circuit Low
Possible symptoms
- Check and replace the fuel cap
- Inspect and repair the wiring or connectors related to the refueling vapor control valve circuit
- Clean or replace the refueling vapor control valve
- Test and replace the fuel tank pressure sensor
Possible causes
- Faulty refueling vapor control valve
- Loose or damaged wiring or connectors in the refueling vapor control valve circuit
- Malfunctioning fuel tank pressure sensor
- Clogged or blocked charcoal canister
- Damaged or leaking fuel filler cap
Possible solutions
- Check engine light illuminated on the dashboard
- Difficulty starting the vehicle
- Decreased fuel efficiency
- Rough idle or stalling
- Fuel odor present inside or outside the vehicle
Free on OBD DashX
P04B1 on OBD DashX
Real-world causes, how often this code shows up, and the fix — step by step.
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