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Home >> Mercury >> 2009 >> Mariner Base, 2.5 7, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) >> DTC Diagnosis >> DTC P0722: - Output Shaft Speed (OSS) Sensor Circuit No Signal

DTC P0722: - Output Shaft Speed (OSS) Sensor Circuit No Signal

DTC P0722: - OUTPUT SHAFT SPEED (OSS) SENSOR CIRCUIT NO SIGNAL

Description:  The OSS sensor failed to provide a signal to the powertrain control module (PCM) upon initial movement of vehicle.
Possible Causes: 
  • Damaged OSS connector
  • Damaged OSS sensor, or not installed correctly
  • Harness intermittently shorted or open
Diagnostic Aids:  Check the wiring, connector, and sensor 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 AUTOMATIC TRANSAXLE/TRANSMISSION - 5R55S Cooling Symptom Chart, Diagnostic Trouble Code (DTC) Index to continue diagnosis.