Hey, had a similar issue with my '05 Hyundai Santa Fe just a while back. I'm no mechanic but I have some experience tinkering with cars. The problem was traced back to a defective cable connection/plug. Had my local workshop guys take a quick look, turned out to be a simple fix and only set me back 95 Euro. Also remember that symptoms can be misleading, so it's always best to have a professional diagnose the issue. By the way, do you have any mods on your Entourage or is it stock? That could help in troubleshooting.

Hey, thanks for your swift response. Nah, my Entourage is completely stock, no modifications or anything. I've driven about 103858 KM with the latest service done last month. And to be frank, until now she's been running pretty smoothly. I suppose it might indeed be the best to take it to a professional for diagnostics, just in case it's something more serious than a simple sensor issue. Thanks again for your advice really appreciate it.

Hey again, no worries! That's what these forums are for. I gotta say, it sounds like your Entourage has been holding up pretty well if it's run that long without any serious problems. Given it's completely stock and you've been diligent with servicing, this is likely just a minor problem. Still, consider having an OBD scanner connected to your ride. It can help to give you a definitive answer on what's causing the check engine light to come on. Several auto parts stores do it for free or you could just get one yourself, kinda handy to have. From there, I'd say definitely get it over to a professional if it's anything other than the coolant temperature sensor issues like you suspect. Oh, and in my experience, I was thankfully in the same position as you, without many funky or unusual issues on my Santa Fe until then. Bent plug was out of the blue but a seemingly simple and common problem that the mechanics knew how to handle right away. But do remember, don't let this sit for too long. An overheating engine is never a good thing, a small issue can escalate quickly if left alone, could damage the engine and end up costing more in the long run. Good luck with it all and keep us posted.

Hey bud, thanks a ton for your advice! True, she's been pretty solid until now, guess I can't complain much, can I? You're right about the OBD scanner, reckon I'll get it checked out as a first step to pin down the issue. Hearing from you and getting the assurance that it may not be anything too serious is a huge relief, really. As you suggested, I'm not planning on letting this go unchecked. It's off to the professionals for me. I'll certainly keep y'all posted with any updates. Thanks again for your help, really appreciate it!