Chrysler Repair: 2000 Chrysler LHS, radiator fan, 2000 chrysler lhs

Question
Hello. There is a light on in my 2000 Chrysler LHS...when I refer to the manual it says the light is the OBD...on board diagnostic light which indicates a problem with the engine, exhaust or transmission... I had the car hooked up to see what the light meant and it came back as a Code P1490 which translates to Low Speed Fan Control Relay Malfunction...The guy at AutoZone says that both my fans are running... I do notice that when I turn on the air or heat, I hear a 'rrrrr' noise and the car seems to be working very hard...Could this problem also be causing me to burn gas at an unusual rate because it also seems as though I am not getting the mileage I should be... What does this code mean, how can it be repaired and is it expensive?

Answer
P1490-LOW SPEED FAN CONTROL RELAY CIRCUIT

POSSIBLE CAUSES
RADIATOR FAN CTRL RLY CIRCUIT WIRE HARN INTERMITTENT PROBLEM
RADIATOR FAN CTRL RLY CIRCUIT WIRE HARN OBSERVABLE PROBLEM
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
RADIATOR FAN RELAY CONTROL CIRCUIT OPEN
RADIATOR FAN RELAY CONTROL CIRCUIT SHORT TO GROUND
RADIATOR FAN CONTROL RELAY
PCM