Captur Coolant Loss Mystery

Hey there! Low coolant is a pain. When you say you're topping it off, how much are we talking? And are you sure you're using the correct type of coolant? Mixing coolants or using the wrong one can cause all sorts of corrosion and blockages, which might be affecting your sensor readings. Also, have you noticed any white smoke from the exhaust, or a sweet smell? Those are telltale signs of a head gasket issue, which can also cause coolant loss. Is the temperature gauge behaving normally or fluctuating wildly?

Okay, good points. Topping off? Maybe a cupful, tops, every week or so. Definitely using the Renault-spec coolant – that blue stuff. No sweet smell, no white smoke, thank heavens! Temperature gauge sits rock steady in the middle, never wavering. But the coolant light persists! You reckon a dodgy sensor could be throwing false positives, even with the error code?

A cupful a week isn't massive, but it IS still losing coolant. And if the temperature is stable, that does point away from head gasket issues, luckily. Since you've covered the basics and the error persists, I'd hate to steer you wrong. My gut tells me to double-check all the hose connections for tiny, pinhole leaks you might be missing, but honestly, that error code points to something deeper that's hard to diagnose remotely. Maybe it's time to let a shop hook it up to their diagnostic tools.

Appreciate the sanity check! Sounds like I've exhausted my driveway-mechanic skills. Bit the bullet and took it in. Turns out, a cable connection to some component had a defect, like you mentioned. A new wire, plug, and a few hours of labour later, and 95€ lighter in the pocket, the gremlin is GONE! Thanks for confirming my suspicions – sometimes you just need another voice to tell you to hand it over to the pros. Cheers!