OBD II COMPUTER CODE READER The easiest and best way to troubleshoot newer vehicles Automatically links to all protocols (ISO 9141-2, J1850PWM, J1850VPW, KWP 2000 ISO 14230-4) Auto-monitoring function periodically retrieves latest codes and I/M readiness status from vehicle's computer?makes it possible for you to verify if repair was completed properly and see if all monitors completed their diagnostic testing One screen shows it all: code sequence; pending codes and MIL status; emission monitor status and I/M readiness; indicates communication/link with vehicle; low-battery indicator; diagnostic trouble codes. ERASE button clears stored computer codes, monitor status and turns off "check engine" light. The 6-ft. J1962 Data Link Connector cable is detachable and replaceable?other readers have attached cable. With comprehensive instruction manual (English, Spanish, French). Battery back-up requires 3 AAA batteries (not included). Limited one-year warranty. SUPERIOR TO OTHER READERS! LCD is larger (1" x 1-3/4") and easier to read. Retrieves both generic (P0) codes and manufacturer-specific (P1) emission codes. Indicates MIL (malfunction indicator lamp) status?you'll know what code(s) caused "check engine" light to come on. Displays pending codes?alerts you to problems that currently exist but have not yet caused "check engine" light to come on. Displays code sequence indicators, emissions monitor state, I/M readiness. Automatic data refresh feature updates data every 15 seconds when reader is connected to vehicle. Battery back-up lets you store codes when reader has been disconnected from vehicle.