https://dannysengineportal.com/position-sensors-ckp-cmp-function-and-failure-symptoms/

The most important sensors, in any engine, are the crankshaft and camshaft position sensors.
Modern computer controlled vehicles, must have the air and fuel ignited, at the proper time, in order to operate efficiently.
Both, the crankshaft and camshaft (CKP) (CMP) position sensors, are part of your car’s, electronic fuel injection and ignition system.
So, position sensors, are here to stay and are constantly evolving, to meet today’s needs.
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