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P0721 Diagnostic Trouble Code Discussion for March 2008

Output Shaft Speed Sensor Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0721
Help Request Posted
2003 Ford F-350 Super Duty XL 6.8L Cuts out, Stall, MIL Lamp on VIN: 1FDWW33S43
P0721: Output Shaft Speed Sensor Noise Interference. This ford will stall when hot, sometimes at idle and sometimes around 1000 RPM. It does it intermitently and when the problem occurs the O/D light will flash and set a output speed sensor code, and if you watch the scanner the OSS, turbine speed sensor, and ve...
March 28, 2008