Why is your CHECK ENGINE light on?

[@ArrowGearhead]

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[@rachammusicstudio7830]

I did

[@KathyCrowe-yr9hd]

Car runs fine, starts fine even in COLD, will check that gas cap and HOPE that's it! Thanks.

[@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.

[@ArrowGearhead]

Thank you for sharing It could be an electrical continuity issue due to vibration from the hole, or it could just be a faulty sensor. Is it only the check engine light or some other light also? What is the code?

[@Pelumi-z5l]

I have experience this a couple of times too

[@dsanmiguel40]

Coolant system issues eg,thermostat

[@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 )

[@88anyname]

My new toyota corolla cross with 3km odometer has engine light on when I started the engine message appeared "engine is not ready to run" ....IDK why😮😢... I just turned off then restarted the car as if nothing happened (no message second time)

[@ArrowGearhead]

Good to hear you get it back. I have also seen this cross issue with someone else few months ago. I don’t know, I assume it is related to safety system like seatbelt, depressing the clutch or pedal while starting, weather issue….

[@50toinfinityatleast]

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.

[@ArrowGearhead]

Watch for also for another symptom along with the check engine light. And, consider using OBD2 scan tool

[@50toinfinityatleast]

@@ArrowGearhead definitely the OBD two scan tool. So far no other symptoms at all that’s a good thing, but it’s very puzzling but the scan to absolutely help a lot. Thanks for answering!

[@shrimp8004]

Why does my check engine light strate flashing when I give it all the gas ,( floor it)

[@ArrowGearhead]

@shrimp8004 would it be a misfire? What other symptoms do you see?

[@shrimp8004]

@@ArrowGearhead the 2 ground n studs back of 5.3 GMC on passenger side that ground wire is brake n where it's connected to it at an can't remember code but it was knock sensor o ya I do show po300 randem misfire to sorry bout that.

[@rachammusicstudio7830]

🎉

[@imcalledmoses]

bad fuel, or fuel quality and requirements.

[@ArrowGearhead]

right