DTC P1900: Output Shaft Speed (OSS) Sensor Circuit Intermittent

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.

P1900 - OUTPUT SHAFT SPEED (OSS) SENSOR CIRCUIT INTERMITTENT

Description:	The OSS sensor signal to the powertrain control module (PCM) is irregular or interrupted.
Possible Causes:	Harness connector not properly seated Harness intermittently shorted or open Harness connector damaged OSS sensor damaged, or not installed properly
Diagnostic Aids:	Verify harness and connector integrity. Verify proper installation of the OSS sensor.
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
Manual transmission, Focus, Freestar/Monterey, LS, Sable, Taurus, Thunderbird, Town Car	GO to TJ: Output Shaft Speed (OSS) Sensor STEP TJ1.
All others	Refer to AUTOMATIC TRANSMISSION .