Technical Definition:
Fan 1 Control Circuit Low
Trouble Code: P0691
Address: 0x0691
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Address: 0x0691
System: Powertrain
Subsystem: Computer and Auxiliary Output Circuits
Technical Description:
Possible Causes:
Possible Symptoms:
Cooling Fan 1 Relay Control Circuit Low
Possible Solutions:
OBD-II Trouble Code Type:
Diagnostic Step:
Tech Notes:
– Faulty Low Speed Radiator Fan Relay
– Low Speed Radiator Fan Relay harness is open or shorted
– Low Speed Radiator Fan Relay circuit poor electrical connection
– Faulty Electric Fan
– Faulty Engine Control Module (ECM)
Specific Makes:
– Radiator fan inoperative
– Possible engine overheating