Hardly functions at Volvo V70

In my V70 times burned the exhaust indicator lamp (MIL), the workshop could but find no reason. Now they shone again and I wanted to go on a quest (although I had not necessarily promise of this rather cheap (cheap?) Device that this could see more) times itself.

While it was recognized right away, but the scan showed a single mistake. Even the pilot light was on, the device could not recognize (it has probably an indication MIL ON / OFF MIL). Also, all the other features that the device has probably not decreased. I bought another OBD II device that some may be more, as engine rpm, speed, coolant temperature display, etc., so it is probably not the Volvo that this device does not display any information here.

What does appear to work - the exhaust gas indicator light might turn off the device. Interestingly, since it has not detected any errors and also the light.

But that's me for such a device too little, so back it.