Mechanic Advice

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Honda Civic 2017 - Every Possible Warning Light On (lemmy.blahaj.zone)

submitted 5 months ago by CoachDom@lemmy.blahaj.zone to c/mechanicadvice@lemmy.world

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Hiya It happened recently that when I turn on the ignition all the electronic systems warning lights goes off. LKAS, ABS, ACC, VS, EP etc but the car runs all right apart from the obvious - the electronic support systems not working. The errors stay on during the driving.

I surmised that its not each individual system failed on its own, it must some sort bad connection maybe?

I already checked the battery (ignition off, switching on and idling) and is perfectly healthy.

I tried unplugging the battery for about 30min - didn't do a thing.

I'm getting an OBD scanner tomorrow so i will post here what it comes back with.

In the meantime - any ideas?

Thank you!

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[–] over_clox@lemmy.world 2 points 5 months ago

That would initially be my first guess yeah, either a bad connection, or perhaps a shorted connection somewhere.

Though it could be any one of a myriad of sensors taking down the entire data bus, which in more modern vehicles is typically a CAN bus..

https://en.wikipedia.org/wiki/CAN_bus

Yeah, the CAN bus definitely reduces the amount of wiring necessary, but also comes with the drawback where any one failed sensor can potentially take down the entire data bus. ☹️

Without knowing much else yet, you might try one-by-one disconnecting different non-essential sensors and see if the overall main problem of all warnings goes away, that could help you try to narrow it down.

Good luck with it though 🤞