Check engine Code P0483

[adharris70]

My check engine light came on and I brought it to my local AutoZone for them to read to the code and it came up P0483(Fan Rationality Check) Can anyone help me with this that has had this problem? It comes and goes and one time all I did is fill the coolant tank with antifreeze and the light went off.

 

[joecool509]

This is what i found. Sound like a fan relay

The electric cooling fan is controlled by the powertrain control module (PCM) through the cooling fan relay based on inputs from the following components:
- The engine coolant temperature (ECT) sensor
- The intake air temperature (IAT) sensor
- The A/C selector switch
- The A/C refrigerant pressure sensor
- The vehicle speed sensor (VSS)

The PCM controls the cooling fan by grounding the cooling fan control circuit which turns ON the cooling fan relay.

The cooling fan relay will be commanded ON when the following conditions are met:
- The engine coolant temperature reaches 106°C (223°F) or more.
- The A/C clutch requested.
- The vehicle speed is less than 38 MPH.

The cooling fan relay will be commanded ON regardless of vehicle speed when the following conditions are met:
- The engine coolant temperature is 151°C (304°F) or more.
- The A/C refrigerant pressure is high.

The cooling fan may be commanded ON when the engine is not running under a fan run-on conditions described in the electric cooling fan general description portion of the service manual.

 

[adharris70]

what do you think?

So after all of that what do you think the problem is the relay switch because my mechanic said it couldn't be the fan