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Diagnostic Trouble Code: 172
Diagnostic Trouble Code Name: Fuel System too lean Heated Exhaust Gas Oxygen Sensor HO2S(1)
Vehicle Make: Ford
Vehicle Model: Falcon (EF)
Diagnostic Code Entered By: ZerOne
Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Please Note: The DTC Information provided has been randomly generated.
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Diagnostic Trouble Code Description:
Output Shaft Speed Sensor Low
Possible Sensor Faults
TCM
Possible Related Diagnostic Trouble Codes
DTCP0722
Circuit / System Description
The vehicle speed sensor (VSS), also called the output shaft speed (OSS) sensor provides vehicle speed information to the transmission control module (TCM). The VSS is a permanent magnet generator. The sensor is mounted in the transmission case facing the rear internal gear which is splined to the output shaft assembly. As the output shaft and internal gear rotate, the toothed rotor of the internal gear produces AC voltage as the rotor teeth pass through the magnetic field of the sensor. The AC voltage level and the number of pulses increase as the speed of the vehicle increases. The TCM converts the voltage to vehicle speed. The TCM uses the output shaft speed signal to determine shift timing and torque converter clutch (TCC) scheduling.
If the TCM detects no vehicle speed when there is engine speed in a drive gear range, then DTC?P0722 sets. DTC?P0722 is a type?B DTC.
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