S70 warning light!!!!

The car is an S70 2.5LPT 20v CD
While I was driving home tonight the "Fault in engine electronic
system" light came on. Everything appears to be OK except that the
radiator fan runs on full speed for about three minutes after the
engine is switched off, even when the engine is cold. I have noticed
that for the last week or so the heater is slow to start working.

Is it a problem with a quick fix? or do I have to pay an expert to
look at it?

 

The best thing is to get the code read. The warning light is indicating
one exists, and hopefully an OBD-II compliant reader will be able to
read it (in North America this will work for sure). What the problem
might be is a thermostat that doesn't close properly, thus the engine
takes too long to warm up. The computer expects that the engine will
warm up at a certain rate, if it doesn't then it assumes the engine
temperature sensor is bad. So it sets a code for engine temperature
sensor, and runs the fan at half speed all the time, and also runs the
fan after the engine is shut off.

--
Mike F.
Thornhill (near Toronto), Ont.

Replace tt with t (twice!) and remove parentheses to email me directly.
(But I check the newsgroup more often than this email address.)