Is it true that if the check engine light is on its because of the gas cap
Yes the check engine light will come on because of improper gas cap fit.
Matter of fact that's the #1 reason a CEL will light up. But , it's not the ONLY reason that will light it
Have the computer scanned. Most auto parts stores will do it for free. Post the trouble codes here and we can help further. HTH. -Jim
Good suggestion Jim. I agree, could prevent something from getting worse = more expensive
How the heck does Chrysler pin-point gas cap, when it's a leak in the EVAP somewhere, but what about, say, a hole in the vapor recovery tube?
Hi Fordnut, don't know about Chryslers but my '08 Grand Marquis has a specific "gas cap light" on the dash. If the cap isn't on properly the light will come on. Maybe Chrysler has that too? -Jim
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