Hi, I had a scan done today thanks to Dave from B8 forum. It shows 2 errors which I want to fix asap. FIRST ONE 17664/P1256 - Engine Coolant Temperature Circuit (G62): Open / Short to B+ Possible Symptoms Difficulties with starting a cold engine. Diesel: an indication is extreme long time burning time of the glow indication light. Starting the engine when engine is warmish or warm, idle rpm immediately is 1200 - 3000 rpm. RPM at idle is irregular. With all engine temperatures seldom idle rpm will vary between 900 - 1000 rpm. With engine warm (90 °C) the engine temperature suddenly drops (70 °C) and slowly comes back to 90 °C. Bad acceleration during warming up. Possible Causes Wiring and/or connections faulty Engine Coolant Temperature Sensor (G62) faulty Possible Solutions Check wiring and connections Check / Replace Engine Coolant Temperature Sensor (G62) Special Notes In MY 1995-2002 (?) in Europe at VW-cars the G2/G62 had the bad reputation of breaking down often. The default G2/G62 is black and all replacements are green. SECOND ONE 17994/P1586/005510 - Engine Mount Solenoid Valves (N144/N145): Short to Plus Possible Causes Wiring/Connectors from/to Engine Mount Solenoid Valves (N144/N145) faulty Engine Mount Solenoid Valves (N144/N145) faulty Possible Solutions Check/Repair Wiring/Connectors from/to Engine Mount Solenoid Valves (N144/N145) Check/Repair Engine Mount Solenoid Valves (N144/N145) Category: Fault Codes Any idea if its easy to change coolant sensor? Would prefer to do it myself when I have a spare minute. Maybe price from stealers ? With the engine mount solenoid valve am I looking at new engine mount?