Just back from a 12 or so hour drive from NYC back home to North Carolina, first long trip in a recently-acquired 2004 XC70. Car drove great the entire time, and it got what I consider to be good gas mileage for this car. No problems - until just now in our driveway back home. The last leg of the tr...

ERO1 (and others), did you figure out a way to get the mileage from the OBD-II ECU?

Neither of my front seat heaters are working - though they both worked just fine last winter. The heater switch lights come on but the seats don't warm up. I followed Ozark Lee's very helpful diagnostic steps above. First step: there is power getting to the seat when the switch is turned on. So far ...

However if I were you I would have the thermostat replaced also, I don't think the cap is your only problem. If your car is more then 5 years old or has over 70K it's time to replace the stat. Just to second this - it might be the thermostat, or it might be the temperature sensor (which is connecte...

I started back last fall having a problem with my 1997 850 GLT wagon wherein while driving there would be what seemed sort of like a "brown out" of the car's electrical systems - all the lights (interior/dash/headlamps) would dim, the (aftermarket) radio would shut off for a second, etc. U...