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I’ve got a 2002 Dodge Ram 1500, Quad Cab, 4.7 liter engine and I’ve got a P1491 error code popping up. Please advise what this is and how to repair it.

P1491 Rad Fan Control Relay Circuit

Is your radiator fan working?? Is the vehicle running hot or overheating??


This is the electrical circuit which turns the relay on, and off, which turns the radiator cooling fan on, and off. There is a problem with this electrical circuit. It may be a broken wire, a disconnected electrical, or a short. Someone with an electrical test meter, the wiring diagram, some knowledge, and some skill needs to check the circuit.