Hello,
I hope that this is the proper part of the forum to ask this question. If not, please point me in the correct area I need to do this.
I was considering ordering one of these OBDII testers.
http://www.ebay.com/itm/SUBARU-Diagnostic-Scanner-Tool-SRS-ABS-CHECK-ENGINE-LIGHT-OBD2-CODE-READER-SCAN-/171876308696
Do they really work? Do they cause any harm to the factory software?
Thanks for any help you can give.