Century V6-173 2.8L VIN W FI (1987)
Transmission Position Switch/Sensor: Testing and Inspection
A "Scan" tool should read P/N when in Park, or Neutral, and R-D, L, when in Drive or Overdrive. This reading may vary with different makes of tools.
Refer to System Diagnosis / Diagnostic Charts / Chart C-1A for Park Neutral (P/N) switch diagnosis.