Hi all,
My friend recently bought s80 4.4 2007 .
He have problem about temp sensor.
When the car and weather is cold car will starting after 5-6 try and obd scanner tool showing that car temp is about -40 but the weather almost 0 . After car working idle for 15-20 minutes its starting to show normal temp and after that when we erased error code car is working normally.if we didnt erased the error code fans are working eating too much gasoline and smell of fuel.
we already tried to change temp sensor but nothing is changed.
What it can be?
The error code is ECM-P011600

 

things I'd look at 1) The ECT - check resistance cold and hot (google for tables on what the values should be but cold 9 (ie 0 not room temp) should be in the 3000 ohms range, hot in the 200-300 range), also check voltage going in (may need a pin probe to slide into the connector back side 2) The wiring harness / connectors 3) thermostat 4) check connectivity from the connection back to the ECU. I assume you've checked the coolant level and there was no recent work that could have created an air pocket. Both a short or an open will throw the code.

 

If the temp readout on the dashboard is also reading incorrectly, it will be the ambient temp sensor located in the door mirror. This feeds the ECU with outside temp data. On UK cars it's located in the left hand mirror, its a domed shape sensor pointing downwards from the underside of the mirror housing. Access via mirror glass removal - go careful not the crack it.
Hope this helps.