Allison WTEC II Fault Code: 22 PID: SPN: 14 FMI: Engine speed sensor reasonableness test

Main code 22 indicates a fault within a speed sensor, the wiring to a speed sensor, incorrect speed sensor gap, or damaged bumps or teeth which create the speed signal. This fault is determined by the reasonableness of a speed sensor signal when compared with the other two speed sensors and the commanded range. A speed sensor will not pass the reasonableness test if there is no signal at all from that sensor when a signal should be present.

Categories Allison, DTC TRUCKS, WTEC II Tags 14, 22, Allison, Code, Engine, Fault, FMI, II, PID, reasonableness, Sensor, Speed, SPN, Test, WTEC

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