2004 Corolla LE automatic with 279,500 miles. CEL came on for the first time ever in nine years of driving. Code says P0456. I checked the original gas cap and it locks on but went ahead and put a new gas cap on today.
My question is, will the CEL clear itself if the new gas cap stops the evaporative leak? The auto parts store won't clear the code.
My wife's Kia Sedona CEL will clear itself after 3 cycles of the error code not occuring.
Thanks for any info!