P04B0

2017-10-10

Description:

  • Refueling Vapor Control Valve Circuit/Open

Possible Symptoms:

  • Check the fuel cap: Ensure that the fuel cap is tightly closed and properly sealed to prevent any vapor leakage.

  • Inspect the EVAP system: Thoroughly examine the evaporative emission control system for any potential leaks or damage.

  • Replace the fuel filler neck: If the fuel filler neck is damaged or worn out, it might be causing the circuit/open issue and needs to be replaced.

  • Check wiring and connectors: Inspect the wiring and connectors related to the refueling vapor control valve circuit to identify any loose connections or damaged wires.

  • Replace the refueling vapor control valve: If all other possibilities have been ruled out, it might be necessary to replace the refueling vapor control valve itself to resolve the circuit/open problem.

Possible Causes:

  • Faulty refueling vapor control valve

  • Loose or damaged wiring or connectors in the refueling vapor control circuit

  • Malfunctioning fuel tank pressure sensor

  • Blocked or clogged charcoal canister

  • Faulty evaporative emission (EVAP) system purge valve

Related Parts:

Possible Solutions:

  • Check engine light comes on

  • Decreased fuel efficiency

  • Rough idle or stalling

  • Difficulty starting the vehicle

  • Fuel odor inside or outside the vehicle

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