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Old 03-02-2010, 12:37 AM
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DaveDees DaveDees is offline
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Symptoms of a P0500 DTC may include:
  • loss of anti-lock brakes
  • the "anti-lock" or "brake" warning lamps on the dash may be lit
  • the speedometer or may not work properly (or at all)
  • your vehicle's RPM limiter may be decreased
  • the shifting of an automatic transmission may become erratic
  • other symptoms may also be present

A code P0500 may mean that one or more of the following has happened:
  • The Vehicle Speed Sensor (VSS) is not reading (functioning) properly
  • There is a broken/frayed wire leading to the vehicle speed sensor
  • The vehicle's PCM is not correctly configured for the actual tire size on the vehicle

The simplest thing to do is to reset the code and see if it comes back.
Next, check all wiring and connectors that lead to the speed sensor. The location of the sensor depends on your vehicle. The sensor could be on the transmission, or perhaps the wheel hub (brake) assembly.
If the wiring and connectors are OK, then check the voltage at the speed sensor. Again, the exact procedure wil depend on your make and model of vehicle.
If everything looks OK, replace the sensor.
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