Stepwgn Overheating Check Engine Light

Overheating and the check engine light? Sounds rough. My old Civic did something similar once. Have you noticed if the radiator fan is actually spinning when the engine gets hot? Sometimes it's something simple like a blown fuse or a loose connection to the fan motor. Before you tear into anything major, check those easy things first. A defective speed sensor would also cause such problems, it's worth checking it out!

When the engine temperature gauge starts creeping towards the red zone, the radiator fan remains stationary. Given this observation, what would be your recommendation for further investigation? Is there a straightforward method to test the fan motor's functionality directly, or should I focus my attention on the speed sensor?

If the fan isn't spinning at all when it's overheating, and you've checked the easy stuff like fuses, then yeah, it's likely the fan motor itself or the speed sensor as I mentioned. Honestly, diagnosing electrical gremlins can be a pain. Unless you're really comfortable with wiring diagrams and multimeters, you might be better off taking it to a trusted workshop. My past taught me that sometimes, saving a bit of money isn't worth the headache!

I consulted with a professional mechanic. It was diagnosed as a defective speed sensor. The repair cost me approximately 250€, but the peace of mind is priceless. Thank you for steering me in the right direction.