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Home >> Ford >> 2011 >> Focus S, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Descriptions - DTC P0600 Through DTC P164A - (Except Diesel & Hybrid) >> DTC P0721: Output Shaft Speed (OSS) Sensor Circuit Range/Performance

DTC P0721: Output Shaft Speed (OSS) Sensor Circuit Range/Performance

P0721 - OUTPUT SHAFT SPEED (OSS) SENSOR CIRCUIT RANGE/PERFORMANCE

Description:  The OSS sensor signal is very sensitive to noise. This noise distorts the input to the powertrain control module (PCM).
Possible Causes: 
  • Wiring misrouted
  • Aftermarket add-on
  • Wiring damaged
  • Wiring insulation wear
Diagnostic Aids:  Check the routing of the harness.
Check the wiring and the connector for damage.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
Manual Transmission GO to PINPOINT TEST DP .
Automatic Transmission Refer to the appropriate Automatic Transmission, Diagnostic Trouble Code (DTC) Index to continue diagnosis.