Home CAR GUIDE SENSORS AND MODULES Car Sensors and Modules Guide

Car Sensors and Modules Guide

Starting back in the late 80s and early 90s, almost all functions of vehicle engines and drive trains have been controlled by a central processor and a chain of sensors. That includes things given below:

  • Spark advance or retard
  • Fuel metering and delivery
  • Transmission shift points
  • Emission controls
  • Traction control
  • Antilock braking

Engine functions that were once performed by mechanical/electromechanical assemblies like the carburettor, distributor, vacuum spark advance, and throttle kick down linkage that are all governed by sensors and the drivetrain computer today.


The module basically controls the intersection of the engine’s necessary ingredients to produce energy — fuel, air and spark. That sounds quite simple, kind of in the same way an engine itself sounds simple if you break it down into really basic terms. But the ECM accomplishes its considerable chore by constantly monitoring a vast network of sensors around the car to ensure conditions are in a normal operating range. When something is not right, the ECM adjusts conditions or, if it can’t, the car won’t run properly or at all. When there’s a problem, the ECM stores a trouble code so it can be repaired by a mechanic (with a scanner specifically designed for that purpose) and triggers the check engine light so the driver knows something is wrong.

Different components of Sensors And Modules are –

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