I have a 01 S60 2.4T. The check engine came on and I noticed that the car is running cool, the temp gauge is only like 1/3 way up (1 notch below middle) at the warmest. I'm thinking its the thermostat.....how difficult are these to change? Is it right there under the 90' elbow into the block from the radiator?

 

Yes it is on the engine where the Upper Rad. hose meets the engine. Remove the Torxes screws and replace the thermostat.

Also try to have the codes pulled to verify.

 

Where is the location for the OBDII Code reader???? I'm assuming its a little port somewhere, just cant find it. Thanks! - Joe

 

It is just above the hood release. You should see a panel that folds down.