Why does the temperature in my Fuga always rise when driving on the highway? I've already replaced the fan module once.

Why does the water temperature rise when going uphill and automatically decrease when going downhill, or when turning on the heater with the air conditioning?

I've been having a headache with my Volvo S80 2.5T. After replacing the radiator, the upper hose has come off three times, and then the lower hose came off once. Does anyone know what could be the reason? The water temperature has been normal, no overheating, and the fan is working fine.

The fan on my Sharan sometimes doesn't turn on even when the temperature is high. What could be the reason? Any advice?

Why did all the windows and sunroof open automatically? I've experienced this once.

My E2, with a 47 kWh battery, charges up to 100%, but why does fast charging only add 35 kWh? I've already replaced the power battery due to the same issue, but the problem persists. Please help, it's urgent.

Why does the engine light keep coming on in my 2017 Kia Pegas automatic? After resetting, it lights up again after driving for a while. I've already replaced the oxygen sensor, but the problem remains.

Does anyone know why the water temperature gauge on the 2020 Jetour X70 with 1.5T engine sometimes shows six bars and sometimes five bars? I've already replaced the thermostat, but it still doesn't work.

Why doesn't my fuel consumption display anymore? It's always showing "——————".

Why does the display always show 7.0 liters per 100 kilometers, both on highways and at low speeds?

When I start my 2021 Outlander, there's a popping sound in the engine bay during cold starts, but it goes away once the temperature rises. Has anyone else experienced this?