johannesschaefer60

Arkana Overheating Issue

I've got a 2021 Renault Arkana hybrid with about 154k km on the clock. Recently, the engine's been overheating, and the check engine light keeps popping on. I've noticed it seems to happen more when I'm stuck in traffic, suggesting the radiator fan isn't kicking in properly. I've checked the coolant level, and it's fine. Also, there's no weird fan noise – it's either full blast or silent. Could a faulty speed sensor be the culprit?

4 comment(s)

Whoa, overheating is never good! It kinda sounds like the speed sensor is messing with the fan's ability to regulate temperature. Have you tried checking the fan relay and fuse? Sometimes, it's just a simple electrical issue. Is the fan spinning freely if you try to turn it by hand (when the engine is off and cool, of course!)?

Good shout on the relay and fuse – I'll check those. Didn't think of that! As for spinning the fan by hand, I haven't tried that yet. But if the fan does spin freely, what does that tell me? I'm trying to work out if it might be the sensor, but I'm not entirely sure where to even start looking for that, or test it.

If the fan spins freely, it suggests the motor itself isn't seized, and the issue is more likely electrical – relay, fuse, wiring, or, yeah, the speed sensor. The speed sensor’s tricky without the right tools. Given the overheating, and the potential to seriously damage your engine, I'd bite the bullet and get it to a workshop. Hopefully they can pinpoint it quickly!

Thanks for the advice! Took it to the shop like you said. Turns out it was the speed sensor. 250€ later, and all is well. Engine's running cool as a cucumber. Appreciate the help!

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