sgbyincons via eBay offers this OBD2 Bluetooth Automotive Diagnostic Scanner Tool, model no. ELM327 This wireless Bluetooth device scans OBDII codes for 1996 and newer cars, light trucks, and SUVs to reveal the reason you're getting a "check engine digital tachometers and many other items that are crucial to vehicle diagnostics testing. People can use these tools for cars, trucks and