I have an Audi S4 (the 2004 B6 version). The cause of the engine warning light coming on has been diagnosed by my local Audi dealership as a failure of the coolant sensor. They have asked for £310 to ...
The P0118 code means that the engine control module (ECM) has detected a voltage signal that’s too high from the engine coolant temperature (ECT) sensor (below). In practical terms, the ECM believes ...