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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 834 (Engine Controls - Powertrain DTC Charts And Descriptions (Except Diesel & Hybrid)) >> DTC Diagnosis >> P0721 - Output Shaft Speed (OSS) Sensor Circuit Range/Performance

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

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2007 Mercury Mountaineer, 2007 Mercury Monterey, 2007 Mercury Montego, 2007 Mercury Milan, and 2007 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
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 - - refer to PINPOINT TEST DP .
All others Refer to the appropriate AUTOMATIC TRANSMISSION/TRANSAXLE article.
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