2010 Chevrolet Spark Crankshaft Position Sensor: A Comprehensive Guide

Genuine GM Crankshaft Position Sensor (Part # 96452986) – Korean-Made, High-Quality, and Priced Competitively

The crankshaft position sensor (CPS) in your 2010 Chevrolet Spark plays a vital role in engine performance. This critical component precisely measures the crankshaft’s rotational speed and position. This data is relayed to the engine control unit (ECU), which uses it to optimize ignition timing and fuel injection. The sensor achieves this by detecting variations in a magnetic field created by the rotation of steel teeth on the crankshaft.

These magnetic fluctuations generate an alternating current (AC) signal interpreted by the ECU to determine rotational speed. This principle is also effective in pinpointing camshaft position. The sensor’s core components include an inductor, a permanent magnet, and a rotor with a tooth count specific to the engine. Typical mounting locations include near the crankshaft pulley, above the flywheel, or directly above the crankshaft itself. The number of wires varies depending on the vehicle’s engine; it can have two or three. During installation, a tightening torque of 10 N.m is crucial. Under normal operating conditions, the sensor exhibits resistance between 200 and 500 ohms and a voltage ranging from 0.2 to 2 volts.

Functioning as a magnetic sensor, the CPS utilizes an electromagnetic coil, a permanent magnet core, and a toothed ring to generate pulses. Additional components include a protective casing, signal wires, and an air gap between the components. The CPS serves as a speed sensor, typically positioned near the flywheel. By measuring rotational speed, it calculates the crankshaft’s position. Each piston movement creates a pulse relayed to the ECU. The ECU then processes this information based on programmed algorithms, counting pulses within a time frame to determine crankshaft speed. Sensors can utilize a sine wave pattern (magnetic), while Hall effect and optical sensors produce a square wave pattern.

Regular maintenance is paramount to smooth engine operation. Neglecting this can lead to costly repairs. A malfunctioning CPS severely impacts vehicle performance. Symptoms include sluggish or erratic acceleration due to inaccurate speed data sent to the ECU, rough idling caused by misfiring cylinders due to faulty ignition timing, inefficient fuel injection resulting in increased fuel consumption, and activation of the check engine light.

Vehicle Compatibility