Hyundai Elantra/Kia Cerato Crankshaft Position Sensor 39180-2B000, precise rotational speed signal detection

Hyundai Elantra and Kia Forte models use crankshaft position sensor 39180-2B000 mounted on the engine block side near the flywheel ring gear to monitor crank speed and angle in real time, feeding data to the ECU to precisely control ignition timing and fuel injection pulse width. OEM number 39180-2B000; installation difficulty medium, recommended labor 0.5–1 hour. If the vehicle experiences starting difficulties, weak acceleration, engine vibration, or stalling, or the check engine light comes on, sensor signal is likely out of spec or damaged and replacement is needed promptly.