djkarlos

I did a run to Gloucester again this morning and I had no warnings appear... The screwdriver scraping might have done the job.

Might be a daft question, but if I'm scraping lots of stuff off the prongs, won't it possibly then cause blockages elsewhere? I was looking for the replacement for the tank, found one https://skodapartsdirect.co.uk/product/skoda-octavia-2013-2025-coolant-tank/ but it isn't clear if the sensor (prongs) is included in it or not.

I took a couple of photos. I can;t work out whether the prong on the right is damaged or has a large build-up of stuff.... And not sure about the cable regards coolant migration, as the wires are exposed I assume you mean inside the sheaths?

I'll try giving the sensor prongs a clean and see if that helps.

The exact message that displayed on the dashboard was "Check coolant! Owner's manual!" so I assumed it was related to the coolant level....

Hi. I have an intermittent issue with the coolant warning light coming on. This is on my 2017 MkIII Facelift vRS TSI hatch. Just over a year ago I had a coolant leak, which resulted in the replacement of the temperature housing. Since then it's been working fine until just after Christmas this year when on a long journey (Bristol to Swindon, the return leg) the coolant warning light came on towards the end of the journey, just before turning off the M4. Since then I've had the warning light come on a number of times, all in very different circumstances, including one time when it came on after only driving for about 5 minutes within town (hadn't driven it that day and the weather was cold). The other times have mostly been when driving for 45 minutes or more, e.g. driving to Gloucester from Swindon (happened on the outbound journey) and didn't happen on the way back - I pulled over, turned off the ignition, checked the coolant level, which was sitting at the upper line and hadn't gone down - started the car again and it was fine the remainder of the journey. I had a service and asked them to look at the coolant, they did a pressure test and all was fine and of course the warning didn't show for them. A few days later I did the same journey again (Swindon to Gloucester), this time it only happened on the way back, tried stopping for a few minutes with the ignition off but it came straight back on again after about a minute of driving. Stopped once more but it came back on again when I started driving. The temp gauge didn't move beyond normal running temp of 90. I figure I'll take it back to Skoda who might just do the usual checks again, charge me for the pleasure and send me on my way. I am tempted now to just start asking them to replace bits until it gets fixed. So what do people recommend? As it seems to be intermittent, I wonder if it's a dodgy sensor somewhere, but this is just a guess.