output speed sensor
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Insufficient input from Output Shaft Speed sensor
<!---- code here to write warning text if needed. ----><TABLE style="OVERFLOW: visible; WIDTH: 100%" cellSpacing=0 cellPadding=0><TBODY><TR><TD class=messageMed style="FONT-WEIGHT: bold">Detailed Description</TD></TR><TR><TD class=messageSmall>The output shaft speed sensor inputs a signal to the PCM, based on the speed of the output shaft of the transmission. The PCM compares this signal with the signal of the VSS or TCSS and determines correct tire size and axle gear ratio.
</TD></TR><TR><TD class=tableHeader>Possible causes :-</TD></TR><TR><TD class=messageMed style="FONT-WEIGHT: bold"><LI class=bodyText>OSS sensor circuit short to GND. <LI class=bodyText>OSS sensor circuit short to PWR. <LI class=bodyText>OSS sensor circuit open. <LI class=bodyText>Damaged OSS sensor. <LI class=bodyText>Damaged PCM.
</TD></TR><TR><TD class=tableHeader>Diagnostic Aids</TD></TR><TR><TD class=messageSmall>Verify sensor signal output varies with vehicle speed.
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Output Shaft Speed (OSS) Sensor
The output shaft speed (OSS) sensor is a magnetic pickup that provides transmission output shaft rotation speed information to the powertrain control module.
The output shaft speed (OSS) sensor is mounted externally on the top of the transmission case. The PCM uses the output shaft speed (OSS) sensor signal to help determine electronic pressure control (EPC) pressure, shift scheduling and torque converter clutch (TCC) operation.
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p0720 error code
I had this error on my 2000 bounder ford motorhome and replace the sensor as the error code was p0720 output speed sensor circuit and we took one trip and it started to happen again. The overdrive light on the shifter starts to blink then the check eng light soon comes on and I have very low power when stepping on the gas. It feels like it won't move. Does anyone have any other ideas that may be causing the problem? Thanks for any help.
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It isn't likely to be the tone wheel, but I threw it out there because it is possible. Usually these type of problems are damaged or corroded wiring.
Someone might be able to inspect the tone wheel by looking in the hole where the OSS goes, but the driveshaft would have to be rotated one entire rotation to see each tooth. The better way is to remove the driveshaft and the extension housing from the back of the trans.
Someone might be able to inspect the tone wheel by looking in the hole where the OSS goes, but the driveshaft would have to be rotated one entire rotation to see each tooth. The better way is to remove the driveshaft and the extension housing from the back of the trans.
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