Originally Posted by raymond~

inherent with the ODBII protocols, it should store transient codes so as not to
keep false positives. so head to your neighborhood auto parts store as many
will check the code for free. if you're game, you may want to pick up your
own reader just to have. the most basic are very inexpensive, with pricier
ones offering more features or probe for more sensors/codes beyond the basic
ODBII codes