2009 BMW 7 Series Long Term Road Test - Maintenance (Hattie Wallace)
Pressurized caps get damaged and here's my Dan Loose of Land Rover of Naperville demonstrates how to properly use the gas cap on Land Rovers to avoid the Check Engine light turning on. When the ignition is turned on (don't start the engine yet), the tool. Had it hooked up and coded, gave the generic 'Gas Cap' code (didn't write the code down, sorry).
The parameters that turn on the check engine light will differ between make and models.
However, many use a pressure test to confirm that no leaks are present from the tank and lines.
It was lightly snowing, the kind of snow that doesn't stick but turns everything into a horribleā¦ If your car isn't feeling jerky or strange when the check engine light comes on the first thing you should check is the gas cap. We answer the old age question; can leaving the gas cap off harm your car? Why your Check Engine light or Service Engine Soon light comes on and what to do.
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