Why is your CHECK ENGINE light on?

Arrow Gearhead
Arrow Gearhead
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Published 2024-06-22
Why Your Check Engine Light Is On?
This video dives deep into what causes the check engine light to come on, and more importantly, what you SHOULD do about it. We'll break down the most common reasons for the light, from simple fixes like a loose gas cap to potential sensor issues.

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All Comments (6)
  • @pakjohn48
    I discovered another reason for the check engine light. On occasion, while driving with no obvious engine problems nor fault symbols on the dashboard diagnostic display, the car would pass over a pothole in the road causing a mechanical shock to both the car and it's ocupants. Simultaneously the check engine light would illuminate on the dash.and remain on thereafter. If I used my OBD2 reader to turn the check engine light off, it would remain off thereafter until the car ran over another pothole or bump in the road, etc.
  • @anisbensassi4028
    Hello everyone, thank you very much for the video howevr it seems my issue is different, im having an issue at idle and many time i get the check engine, the issue that the engine is shaking and there is a lot of vibration on Idle, its very good when its running on the road . i change all spark plugs to irradium and coils as well even all 4 are new, as well i opned the engine air part and cleaned it and changed the 4 joins on the air area upper to the injectors, as well i changed the throttle body to a new one and still the same issue > i used liqui moly products and and changed oil always on time. there is no loss in water/ oil and heating engine is good as well i cleaned many sensors that i can reach and cables using the electronic cleaners however still the same issue please help me guys, its driving me crazy... thanks ( clio 3 1,4 petrol 2007 )
  • @Alwayslearnimg
    Mine says check emissions system. It’s not the fuel cap for sure. So I’m not sure what else it could be besides probably a faulty sensor.
  • @shrimp8004
    Why does my check engine light strate flashing when I give it all the gas ,( floor it)