🔧 Unlock Your Vehicle's Secrets! Patented One-Click I/M Readiness Key for instant state emissions readiness. Intuitive display for testing voltage, continuity, and current at your fingertips. Seamlessly works with all OBDII & CAN vehicles from 1996 onwards. Diagnoses 12V charging systems, starting systems, and battery conditions effortlessly. Quickly identifies the cause of the Check Engine Light (MIL) for peace of mind. Tests voltage, continuity, and current One-Click I/M Readiness Key Works on all 1996+ vehicles The Autel AL439 OBDII and Electrical Test Tool is a versatile diagnostic tool designed for all vehicles from 1996 onwards. It features a unique One-Click I/M Readiness Key for quick emissions checks, an easy-to-read AVOmeter for testing electrical systems, and the capability to diagnose common issues like the Check Engine Light.