TwinTurbo.NET: Nissan 300ZX forum - Recheck the grounding lugs on two places at rear of plenum..
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Subject Recheck the grounding lugs on two places at rear of plenum..
     
Posted by jzack on April 15, 2016 at 6:52 PM
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In Reply To Plenum pull codes. posted by tinner on April 15, 2016 at 06:21 PM
     
Message One is near the center of plenum rear and the other on the driver side. All the wires going to the grounding lugs are black. Those lugs need to be in good metal contact with plenum. Bad connections can destroy the PTU, make the car run poorly, etc. Grounding issues like this have been posted by others after a plenum pull.

No idea what's causing the speed sensor code but the grounding issue above may be related to it?

     
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