MID 128-PID 26 MID 128-PID 26 MID 128 PID 26 — FAN SPEED ERROR Short Circuit -, Measuring line Open Circuit, Measuring line Open Circuit, Ground line Failure Mode Identifier (FMI): 3 (Voltage Above Normal or Shorted to High) Possible causes: Parameter Identification (PID): P26 Cooling Fan Speed (CFS) sensor failure Faulty Cooling Fan Speed (CFS) sensor harness Message Identification (MID): 128 FMI 3 Reaction from Engine Management System (EMS) Module: Voltage Above Normal, or Shorted To High Source MIL lamp illuminated Noticeable external symptoms: Conditions for fault code:
Higher fuel consumption Missing signal from Fan Speed Sensor Will work as on/off fan, 100% fan speed if cooling is needed Short Circuit +, Measuring line MID 128-PID 45 MID 128-PID 45 Page 19 MID 128-PID 26