An automotive multimeter can be used to measure AC/DC current, check duty cycles, and test car batteries. One can also measure temperature from different engine locations and identifying faults in engine wiring. Moreover, one can instantly measure rpm, test different engine sensors record the engine performance data, and check the emission level. Thus, doing a complete round-up of the engine to make sure it is working properly and donâ€t need an inspection. However, depending on the price and model, each u003cstrongu003eautomotive amp meteru003c/strongu003e has limited features.