There is one change oil wire that came from the car that I did not use. The digital DIC gets that info through its data line vs the analog got it through that wire. Just tape it up. BTW, flashing 0's means it lost communication. Double check to make sure you have the Data wire hooked up correctly (one that goes to the OBDII port). Your car being a 97 may have a different color data wire. I am not sure, and there is really no way that I know of to test for a data wire with a multimeter.