Unveiling the Enigma Check Engine Light On, Yet Car Drives Perfectly

It's not a bad sign. It simply means something is not working optimally. It may seem to run fine, but your gas mileage may suffer, or the engine ... Your Check Engine Light will pop up yellow if it's in need of service but still safe enough to drive on over to a service center. On modern cars the check engine light generally means there is a problem with the emissions system. The On Board Diagnostics (OBD) system or OBD II (depending ... First, Rule Out or Resolve Any Issues · Loosened or damaged fuel cap · Failing oxygen (O2) sensor · Clogged or damaged catalytic converter · Malfunctioning Mass Air ... The problem can even be as simple as forgetting to tighten your gas cap – in fact, this is the most common reason why check engine lights appear in the first ... Is constantly on: This means the onboard diagnostic system has detected an issue that needs to be fixed. While you can still drive your car and it may seem to ... Engine oil level is fine and engine temp is fine; car drives fine. The ABS warning is no longer on, but the check engine warning light remains. No. My rule of thumb is to run a tank or two of gas through the car once the light comes on. If the light doesn't go off then I take it in. The check engine light is constantly on: Your vehicle's onboard diagnostic system has determined something is wrong and needs to be fixed. Although your vehicle ... The car runs fine but these lights won't go out, even when I press the VSC button. 2010 Toyota Corolla. -. Maintenance & Repair. Why my check ...