DTC P0721: Output Shaft Speed (OSS) Sensor Circuit Range/Performance
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2006 Mercury Mountaineer, 2006 Mercury Monterey, 2006 Mercury Montego, 2006 Mercury Mariner, and 2006 Mercury Grand Marquis. 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: |
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| Diagnostic Aids: | Check the routing of the harness. Check the wiring and the connector for damage. |
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| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| Manual transmission | - | - | GO to Pinpoint Test DP . |
| All others | Refer to the appropriate AUTOMATIC TRANSAXLE/TRANSMISSION article . | ||