I assume you are talking about the Ian hawkins Torque app for Android phones? what it reads is more down to your EML 327 bloothtooth connector if that's the type you are using. they seem a bit hit and miss at the cheaper end of the market.Although i bought
from the cheaper end cost about 15 notes and works pretty good on my bravo and mondeo.
Make sure to get an OBDII ELM327 one (a cheap £10 Fleabay one should do). You should then have access to the following sensors:
I find the engine load percentage the handiest for saving fuel Most of the other ones are totally untrustworthy, for instance the horsepower output. After flooring it from 20mph-85mph, it said the maximum had been 22hp...
OH and always disconnect it when not in use... having your car sat idle for 4 days then having to be jump started from a 1990 Mini isn't good for your image I discovered...