Does a Car Need Repair When the Fuel Pump Nozzle Keeps Tripping?

[Chris]

When the fuel pump nozzle keeps tripping during refueling, it usually indicates that the vehicle's charcoal canister is clogged. If you encounter this issue, it's advisable to visit a repair shop and have a technician inspect the condition of the charcoal canister. Another possible cause is refueling too quickly, which can cause fuel to splash and trigger the automatic trip mechanism of the nozzle. The charcoal canister functions by using activated carbon to adsorb fuel vapors, enabling their recycling and reuse. It also prevents fuel vapors from being directly released into the atmosphere and helps regulate internal pressure in the fuel tank. A clogged charcoal canister increases internal pressure in the fuel tank during refueling, leading to premature nozzle tripping. Cleaning the charcoal canister is necessary to resolve this issue. Most vehicle maintenance manuals do not specify a replacement interval for the charcoal canister. Owners should maintain or replace it based on its condition, typically every 40,000 to 60,000 kilometers at a 4S shop. If frequent nozzle tripping occurs during refueling, the charcoal canister should be serviced. Other causes of nozzle tripping include rapid refueling, which leads to fuel splashing, or a complex fuel tank pipe design that causes fuel to splash and trigger the nozzle.