How to Reset the Warning Light Gas Cap That Is Loose or Missing

1. Turn off your vehicle’s engine.
2. Step to the gas cap door.
3. Replace the gas cap.
4. Close the gas cap door.
5. Use an OBD-II code scanner if the warning light does not disappear.
6. Continue driving the vehicle.

Something as simple as forgetting to replace the gas cap could cause your “check engine” light to come on. This is because the gas cap keeps vapors from escaping the fuel tank. A loose or broken gas cap can dramatically reduce fuel efficiency and increase emissions.

To reset the check fuel cap light in the honda accord, turn off the engine, open the fuel door and tighten the cap, then restart the engine.

The “ check fuel cap” is one of the most difficult displays you will find on a Honda Accord. Whenever the message displays it means that the fuel tank has a pressure leak. You will get the message if the fuel tank simply is gone, if it is damaged, or if is simply not tight enough.

Typically if a check engine light comes on after filling the fuel tank, it’s due to a vapor pressure problem. This often is triggered by one of the EVAP system components. This system is designed to filter harmful vapors from the fuel tank. An older or incorrect fuel cap can cause this issue.

A loose, missing or damaged gas cap can cause the light to turn on because the vehicle’s onboard computer recognizes that it is losing pressure in the gas tank. A gas cap helps maintain proper pressure in the tank and also keeps the gas from evaporating, as well as preventing fumes from being released into the air.

Driving without your gas cap will not harm your engine. Driving without your gas cap will not cause you to lose fuel. There is a flapper valve built into your car, and it will stop fuel from flowing out of your tank. Driving without your gas cap will not deliver harmful fumes into your passenger cabin.

Examine the light labeled, “Check Fuel Cap.”. Under normal conditions, many of your instrument panel lights stay on for a few seconds after starting the engine. If the light does not turn off after a few seconds, you’ll need to check your gas cap. Turn the engine off before checking the gas cap.

You can check the gas cap to make sure it’s properly tightened, but if the light does not turn off, the cap will likely require replacement. According to the Honda Accord manual, a faulty gas cap can eventually cause the Accord’s check-engine warning light to illuminate.

The only thing you may notice is the slight smell of fuel (particularly if your tank is full). If you do smell fuel, that confirms that the check fuel cap message is accurate. If it was snugged down, replacing the fuel cap would be the most likely fix. They are very affordable (usually around twenty bucks).

Your Honda’s computer will throw the “Check Fuel Cap” warning when it detects that the pressure has changed enough that it’s likely that there is a gas cap leak. Otherwise, it would have thrown an EVAP related trouble code (most likely P0457 ). Check to make sure that the fuel cap is tightened. If it was loose, you’ll need to snug it.