Question about Ford F-250 Super Duty
The OSS or Output Shaft Speed Sensor is located in the top of the tail shaft housing of the transmission just before the driveshaft, it is an 8mm bolt that holds it in, very tight place to be but can be change fairly easy.
Posted on Sep 16, 2017
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Posted on Jan 02, 2017
DTC = P0720
footnote b = MIL (malfunction indicator light) comes on after 2nd occurance
footnote c = tranny control indicator light (TCIL) flashes
circuit = OSS = output shaft speed sensor in the tranny (not the variable speed sensor (VSS) in the diff).
condition = OSS sensor circuit malfunction
probable causes = Short/open circuit, sensor, PCM
My guess? Replacing the OSS will take care of it. I hope you don't have a faulty PCM.
Posted on Mar 09, 2009
This vehicles computer system has self diagniosing and testing capabilities, When the computer senses that there is a problem with any of the components it stores the corresponding trouble code(s) in its memory and lights up the "Check Engine" to alert you that there is a problem and your car needs to be looked at. To properly diagnose what is wrong, you need to take your car to a mechanic or a dealer, the technician at the dealership or shop will then hook up a scanner to the car computer and retrieve the stored trouble code(s). Then he (she) will look it up in the service manual provided by a car manufacturer. The service manual contains the list of possible codes (about few hundreds) and describes what each code means and what needs to be tested. The code itself doesn't tell exactly what component is defective - it only indicates where to look, what engine parameter is out of normal range. The technician will have to perform further testing to pinpoint a defective part.
Posted on Feb 23, 2010
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