Technical Definition:

Fan 1 Control Circuit Low

Trouble Code: P0691
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

Leave a Reply

Your email address will not be published.