Oncethe temp gets so hot, the ECU commands the radiator fan to come on. If your A3 has a bad engine temp sensor the radiator fan won’t know to come on, because the ECU won’t know how hot the engine is. You’ll need to locate and test the engine temp sensor. Depending on the model year and engine, the location varies.
00779- Outside Air Temperature Sensor (G17) 00779 - Outside Air Temperature Sensor (G17): Open or Short to Plus Possible Symptoms. In the Instrument Cluster you see dashes (---) instead of a temperature; Possible Causes. Wiring between Outside Air Temperature Sensor (G17) and Instrument Cluster: Open or Short Circuit; Possible Solutions
Yousee the coolant temp. sensor is an input to the engine computer , not directly to the temp. gauge. The instrument panel cluster (IPC) displays the engine
A4(B9 Platform) Discussion - OM: ambient air temperature sensor circuit located? - Hi guys i have Audi a4 2017 today check engine appears in dashboard with fan is high when I checked the problem is ambient air temperature sensor circuit the technician can’t find the sensor everywhere even the plumber removed he can’t Wrongor missing radio station logos. Audi A1 - Audi A1 Coolant temp sensor locations - hi guys, im looking for the location of the coolant temp sensor for the 1.4 tfsi. ive found a grey connection on the radiator. its failed its mot and the garage have diagnosed the temp sensor to be causing a high CO reading on fast idle tests. thanks! czKS4F.