... (P1, P3, and U1) codes Displays DTC definitions on unit screen Views freeze frame data Displays O2 sensor data as well ... gives clear, concise DTC definitions on its large back-lit LCD screen. This CAN enabled tool, retrieves generic P0, P2 and P3 ... specific (P1, P3, & U1) codes Displays DTC definitions on unit screen Views freeze frame data Displays O2 sensor data as well ...