Gas Cap Oversight The Silent Troublemaker of Check Engine Lights

This MotoRad Fuel Tank Cap fits your 1967 GMC C35/C3500 Pickup and is perfect for a tune up or performance upgrade. . Is your check engine light on? Be sure to check your gas cap! It is one of the most common causes of a #checkenginelight. If your check engine light is on, it could indicate a variety of issues, ranging from "Oh no..." to "Oh, that's not so bad. Yes, a loose gas cap can turn on the check engine light (CEL), primarily on vehicles built after 1996. But a loose fuel cap certainly isn't the ... 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 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 ... ENGINE LIGHT & GAS CAP LIGHT · Turn your car off, and wait until the engine is completely cool. · Put on safety glasses and gloves as a precaution ... ... Cap Light with no special tools, GAS CAP CHECK WARNING LIGHT ON? FIX ... EASY: Turn Off Check Engine Light for FREE. TightWadDIY•1.8M ... The reasons for a check engine light turning on can range from something minor like a loose gas cap to something more serious like a faulty catalytic converter. You're probably fine, most likely the engine has the code “vacuum leak (small)” this is because your gascap has a rubber seal around it and ...