I'm new to the forum, so bear with me.
Less than 24 hrs after recently filling up my '02 V70 (non-turbo) with gas the check engine light came on. I checked the gas cap. It seemed tight, but I unscrewed it and put it back on nonetheless. (It may worth mentioning that the plastic cord that connects the gas cap to the car had recently broken - not sure how/why, I, suppose due to age.) When the code persisted for a week or so I took the car to Auto Zone. OBD indicated an "evap leak" according to the AZ employee who checked it. He said he didn't have a specific code. After disconnecting the OBD he turned the car off, then back on and said, "Must've been the gas cap because the code is no longer showing up." Several days later I filled up on gas and once again the CE light came on the next day. My question: Is the likely culprit the gas cap? If I replace it and it was the culprit all along, will the CE go off?

 

yes, if the worn out gas cap is triggering the light, buying a new gas cap will fix the problem.

But you need to post the specific code that is triggering the CEL, other things can trigger an evap leak codes. Invest money in a good code reader, you'll use it regularly.

 

jda2000,
Thanks. Will the light go off, or will it need to be reset?

 

Hello, If the source of the leak was "fixed" the code will go off in time. jda2000 spoke wisely when he suggested buying a code reader. With one you can get a real number and accurately tell how long it takes to return after you clear it. Kira