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Symptoms of a faulty crankshaft position sensors include the engine refusing to start (obviously), but also includes the engine mysteriously ceasing to run for no apparent reason, and often with no OBD code thrown; shutting off the ignition switch and starting the engine will some times work for a few minutes, or even a few days, and then the engine will suddenly quit running again. The number of failures increase as the sensor degrades. Also, there is usually no pattern regarding heat: a car might not start even if it is cold, not just fail to start if it is hot. --Desertphile (talk) 23:40, 17 July 2016 (UTC)
This article presently has the flowing text: Some engines, such as GM's Premium V family, use crank position sensors which read a reluctor ring integral to the harmonic balancer. This is a much more accurate method of determining the position of the crankshaft, and allows the computer to determine within a few degrees the exact position of the crankshaft (and thereby all connected components) at any given time. Surely the claim for much more accuracy is not correct as it stands and needs verification and explanation. CPES (talk) 21:56, 20 November 2016 (UTC)