FAE Coolant temp sensor (FAE 32370, noted as Volvo 9186486 equivalent on many websites), brand new from 2025: reads 72 000ohms at ~20°C, when the spec calls for 2400...
ECU must have thought it had traveled to the arctic overnight !

For Vol FCR i use a kkl vagcom I bought years ago. For the Xiaotec android app I have a Veepeak elm327, not the big fancy one, a short blue one I paid like 18€ for on Amazon. Works great, even for the advanced stuff like getting the VGLA code