If you’ve ever felt that mini heart attack when the check-engine light pops up, trust me — you’re not alone. But what’s even more annoying? When you think you fixed it… and boom — it returns a few days later. I used to deal with this too, especially when I bought my first car. I’d clear the code, drive around, and feel like a genius — until the light came right back to roast me. 😅 So let’s break down why this keeps happening , and more importantly, how to stop it for good . The #1 Reason: We Fix the Symptom , Not the Problem Most new drivers grab an OBD2 scanner, see a code, Google it, replace one part, and call it a day. But here’s the truth: A check-engine light is usually a chain reaction — not a single issue. Example: You get a P0420 code (catalytic converter). People instantly replace the cat — $$ gone — but the root cause was a misfire or bad O2 sensor that damaged it in the first place. Mistake Most Beginners Make We clear the code to “see if it comes back.”...