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Professional 909X User Manual
P0201 - Injector circuit malfunction, Cylinder 1
2.4 Location of the Data Link Connector (DLC)
The DLC (Data Link Connector or Diagnostic Link Connector) is typically a 16-
pin connector where diagnostic code readers interface with the vehicle’s on-
board computer. The DLC is usually located 12 inches from the center of the 
instrument panel (dash), under or around the driver’s side  for  most  vehicles.  If 
Data Link Connector is not located under dashboard, a label should be there