Woman Asked to Diagnose Her Own Car at AutoZone Sparks Online Outrage

A Montana woman visited AutoZone seeking its free diagnostic code reading service after her vehicle's "Check Engine" light came on. However, instead of performing the scan for her, a store employee simply handed her the diagnostic tool and instructed her to plug it into the OBD port herself and turn on the ignition to retrieve the data. She later posted a complaint on TikTok, saying, “O’Reilly would never treat me like this!” The video sparked widespread discussion online. Some commenters argued that auto parts store staff aren’t professional mechanics and merely providing the tool is standard practice; others pointed out that free code reading is meant only as a basic assistance service and shouldn’t be mistaken for professional diagnostics. In reality, such devices can only retrieve fault codes—they cannot pinpoint the exact cause of the issue, which ultimately requires expert diagnosis. The incident highlights the gap between consumers’ expectations of “free code reading” services and the actual limitations of what these services can offer.