This will cause the fuel hose nozzle to shut off, and it can even cause the fuel to pour out everywhere except in the fuel tank. If the charcoal canister or fuel vapor vent line is clogged, the air will not be able to flow out when you pour fuel in. Fuel goes into the tank, and therefore gases and air needs to go out. The same applies when you refuel your car. This will create high pressure in the fuel tank. The fuel fumes are going through the charcoal canister, and if the canister is clogged, the fumes will struggle to pass. To know exactly why the check engine light is showing up, you need to use a diagnostic scanner to check the trouble codes. If the engine control unit notices that there is a leak in the system or if it is clogged, the check engine light will show up. The EVAP system is a closed system that needs to hold a specific pressure. This is exactly what can happen if the charcoal canister has gone bad.
EVAP SYSTEM MONITOR ON A 98 F150 4.6 TRITON CODE
The engine control unit is constantly monitoring all sensors in your car engine, and if one fails, it will store a trouble code and show a check engine light on the dashboard to notify you that something is not as it should be. Here is a more detailed list of the signs of a bad or failing charcoal vapor canister to look for: 1. You can also hear a hissing noise when opening the fuel tank cap. You may also find it difficult to fill up the fuel tank at the gas station without making a mess. The most common symptom of a bad charcoal canister is a check engine light on your dashboard. Charcoal Canister Replacement Cost Symptoms Of A Bad Charcoal Vapor Canister
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