Dashboard coolant temperature low? Don’t ignore it. Diagnostics & Engine Carbon Clean on an Audi A4 1.9 TDI (2002 – 179,209 miles)
🌡️Keep an eye on your dashboard engine temperatures. If they are low (norm is usually halfway) then your engine will be running cold, inefficiently and using more fuel than it should. ℹ️ A replacement thermostat (and/or temperature sensor) should get it running at the right temperature bringing the fuel efficiency