Excursion showing codes PO503,PO720,PO722 anybody know what I need to replace?

 

Something is wrong with your speedometer, speedometer cable, or speedometer sensor.

P0503* Vehicle Speed Sens Noisy
P0720* Output Speed Sens Circ Error
P0722 Output Speed Sens No Signal

Stewart

 

Thanks Stewart.The V10 runs good for 30 miles and then runs rough and will start when it idles.Not sure what I need to do to fix this

 

Hmmm, that sounds like more than speedometer cable/sensor issues.

What kind of code reader did you use?

Stewart

 

<TABLE border=1 cellSpacing=0 cellPadding=3><TBODY><TR><TD vAlign=top align=left>P0503 - Vehicle Speed Sensor (VSS) Intermittent </TD><TD vAlign=top align=left>Indicates poor or noisy VSS performance. Vehicle speed data is received from either the vehicle speed sensor (VSS), transfer case speed sensor (TCSS) or anti-lock brake system (ABS) control module. </TD><TD vAlign=top align=left>

• Noisy VSS/TCSS input signal from Radio Frequency Interference/ Electro-Magnetic Interference (RFI/EMI) external sources such as ignition components or charging circuit.
• Damaged VSS or driven gears.
• Damaged TCSS.
• Damaged wiring harness or connectors.
• Malfunction in module(s) or circuit connected to VSS/TCSS circuit.
• After market add-on.

</TD><TD vAlign=top align=left>Monitor VSS PID while driving vehicle, check for intermittent vehicle speed indication. Verify ignition and charging system are functioning correctly</TD></TR></TBODY></TABLE>
<TABLE border=1 cellSpacing=0 cellPadding=3><TBODY><TR><TD vAlign=top align=left>P0720 - Insufficient input from Output Shaft Speed sensor </TD><TD vAlign=top align=left>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><TD vAlign=top align=left>

• OSS sensor circuit short to GND
• OSS sensor circuit short to PWR
• OSS sensor circuit open
• Damaged OSS sensor
• Damaged PCM

</TD><TD vAlign=top align=left>Verify sensor signal output varies with vehicle speed. </TD></TR></TBODY></TABLE><TABLE border=1 cellSpacing=0 cellPadding=3><TBODY><TR><TD vAlign=top align=left>P0722 - No signal from Output Shaft Speed sensor </TD><TD vAlign=top align=left>The output shaft speed sensor failed to provide a signal to the PCM upon initial movement of vehicle. </TD><TD vAlign=top align=left>

• Damaged OSS connector
• Damaged OSS sensor, or not installed properly
• Harness intermittently shorted or open

</TD><TD vAlign=top align=left></TD></TR></TBODY></TABLE>

 

I used the reader that came with my Superchips MAX Micro tuner that I use on my 7.3 diesel PU.