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OBD-II DTC Codes P0800 – P0899

P0801  Reverse Inhibit Control Circuit Malfunction 
P0803  1-4 Upshift (Skip Shift) Solenoid Control Circuit Malfunction 
P0804  1-4 Upshift (Skip Shift) Lamp Control Circuit Malfunction 
P0812  Reverse Switch Input Malfunction (Ford)