雪佛兰GM凸轮曲轴位置传感器 12637869 发动机精准检测

If your Chevrolet engine experiences starting difficulties, rough idle, weak acceleration, or intermittent misfire, it usually indicates worn camshaft or crankshaft position sensors. This sensor monitors crank/shaft speed and phase in real time and transmits signals to the ECU to control ignition timing and fuel timing for smooth engine operation. This product OEM number is 12637869, fits Chevrolet Cruze, Malibu, Trax and Buick Excelle, Verano, etc. with 1.4T/1.5L/1.6L engines. Installation requires disconnecting the battery negative, cleaning mounting holes, and torque tightening bolts to specification to avoid signal interference or loosening.