P1491

#1

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.

#2

P1491 Rad Fan Control Relay Circuit

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

transman

#3

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.