I have a '97 626 in my shop with this VSS code intermittently appearing.this causes no VSS signal to be read by the PCM,even though the sensor has been replaced,and a lab ocilliscope connected to the circiut right at the pcm shows the sensor is sending a signal out.Tried another PCM,new wiring harness,added extra grounds to PCM circiuts,but the code randomly returns along with the resulting erratic shifting.Any advice would be appreciated.Regards,John
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