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Features and Benefits: Retrieves generic P0 P2 P3 and U0 manufacturer specific P1 P3 and U1 codes and pending codes Reads live PCM datastream live O2 sensor test data and freeze frame data Built in Amp/Volt/Ohm multimeter allows you to test amperage 20A max voltage resistance wiring switched duty cycle and more Built in Starting/Charging system testing easily diagnoses vehicle electrical systems Multilingual menu and DTC definitions English Spanish and French The AutoLink AL539 OBD II and Electrical Test tool supports all 10 modes of OBD II for a complete diagnosis. Featuring the unique patented One-Click I/M Readiness Key graphing digital Multimeter starting and charging system tests TFT color display and a built-in speaker the versatile easy-to-use AL539 will streamline automotive service and help ensure a rapid accurate diagnosis and timely repair.