Woman’s Check Engine Light Comes On. Then She Uses Cataclean From O’Reilly: ‘I Think It Cost Me $27’

The check engine light on a California woman’s car came on. Instead of rushing to her mechanic, she used Cataclean from O’Reilly Auto Parts. The move may have saved her money or just bought her time.

TikTok creator Nat Banda (@natbanda) posted a video asking for advice on the subject. “I'm due for a smog check and my check engine light is on,” she says to start the video. “I did run it through the scanner and it gave me the 420 code, which is emissions. So something to do with my catalytic converter.”