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Missing fuel cap detection system

  • US 20050057349A1
  • Filed: 09/16/2003
  • Published: 03/17/2005
  • Est. Priority Date: 09/16/2003
  • Status: Active Grant
First Claim
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1. A method for detecting a missing or improperly installed fuel cap on a vehicle, comprising:

  • conducting a first leak test that detects a leak in an evaporative emissions system of a vehicle;

    conducting a refueling test that detects a refueling of said vehicle when said first leak test detects said leak; and

    activating a fuel cap indicator in said vehicle when said first leak test detects said leak and said refueling test detects said refueling.

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