Check Engine Light A Gas Cap's Tale of Mischief

The gas cap will make the check engine light go on. Same thing happened to me once. I cleaned the gasket on the cap and cranked it down really ... Other related issues that could set off a vehicle's engine warning light include leaks in your gas fill hose, a faulty gas pump seal or gas cap ... These fuel vapors may trigger errors in the emissions system, which would light up the check engine light. Dirt and Grime that gets into the fuel tank could ... A check engine light triggered by a loose gas cap will go out by itself after the gas cap's been tightened. The manual seems to say it will. The gas cap will throw a check engine light if it needs to be replaced, and sometimes it'll cause one because it wasn't tightened enough after ... Sometimes, the reason why your Volkswagen check engine light is on is simply due to a loose or cracked gas cap. This can cause fumes to release in LaGrange, ... The Smog Check failure must not be due solely: To an ignition timing adjustment, or. A failed gas cap function test, or. A tampered emissions control system ... A loose gas cap can trigger the "Check Engine" or "Service Engine Soon" light. Make sure the cap is secure and tight. Always check! How about a check engine light for starters? A loose gas cap will not only let in grime and dirt, but it can allow fuel vapors to escape the fuel tank. These ... Just as with a blown intake gasket, this will result in unexpected readings by the oxygen sensor, triggering a P03xx code. A purge valve is more ...