Technical Definition:

Fan Speed Sensor Circuit No Signal

Trouble Code: P0528
Address: 0x0528
System: Powertrain
Subsystem: Vehicle Speed Control, Idle Controls, and Auxiliary Inputs
Technical Description:

Possible Causes:
  • Faulty fan clutch or electric fan
  • Open circuit in cooling fan sensor harness or connector
  • Faulty PCM/ECM
  • Faulty cooling fan speed sensor
  • Accessory belt broken

Possible Symptoms:
  • Malfunction Indicator Lamp illumination (a.k.a. Check Engine Light)
  • Vehicle may be overheating or running hotter than normal

Fan Speed Sensor Circuit No Signal

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– Faulty Fan Speed Sensor
– Fan Speed Sensor harness is open or shorted
– Fan Speed Sensor circuit poor electrical connection
– Faulty fan clutch
– Faulty PCM

Specific Makes:

– Engine overheating

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