A crankshaft sensor is responsible for counting the engine crankshaft
A crankshaft position sensor (CKS) is used to reference crankshaft rotation as the engine is running while
supplying feedback data to the
. This sensor is mounted near the crankshaft,
flywheel or in the
the manufacturers design. As the crankshaft spins
it creates an electrical pulse pattern that changes with engine speed. This wavelength
controls computer output circuits such as fuel injector pulse width, camshaft
and ignition timing adjustments. The reluctor or stator wheel is fastened to the crankshaft which is used by the sensor.
This sensor goes by different names depending on the manufacturer, crankshaft
angle sensor, CKS sensor, crankshaft position sensor but performs the same function.
When these sensors fail they can cause
. Usually the sensor will start to work again once it has cooled.
Some computer controlled systems may have a difficult time detecting a
because there is other reasons an engine can stop running such as stalling when the clutch
is engaged to quickly. Information is compiled from both crankshaft and
to output camshaft position adjustments performed by the
variable camshaft timing actuator-phaser
is used to detect
detonation-pinging to further input data for the computer while retarding ignition
timing to compensate.
A crankshaft position sensor uses a magnetic coil mounted inside a plastic housing
while supplying an electrical connector to transfer data to the computer. The computer
also uses this sensor to gather misfire data due to the temporary slowdown of the
crankshaft while the
occurs. When the starter is engaged the computer uses the crankshaft positions
sensor to confirm the engine is actually cranking over. Once this confirmation is received
the computer will signal various relays such as the fuel pump relay and ignition systems that the engine ready to start.
replacing a crankshaft position sensor
always use an OEM (Original Equipment Manufacturer) part or equivalent, cheaper
sensors do not last as long or perform
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Article first published 2017-06-27