When is the p0480 control circuit code detected?

The P0480 code is detected when the Powertrain Control Module (PCM) detects that the commanded state of the driver and the actual state of the control circuit do not match. The PCM controls the cooling fan by grounding the cooling fan control circuit which turns ON the cooling fan relay.

When to set the p0481 fan relay code?

When the PCM attempts to activate the fan and senses the command and the result do not match, the code is set. NOTE: P0481 speaks of the basic circuit, however codes P0480 and P0482 relate to the same problem with the only difference is they relate to the different fan speed relays.

What does NC mean in a control relay?

This means when there is voltage, the contact closes and allows current to flow through. NC contacts allow current when the relay is not energized. Opposite to NO, NC contact opens and interrupts the current flow. *Change Over (CO) is the same as Double Throw (DT) relay.

What causes a faulty fan control relay 1?

Potential Causes. The causes for this DTC may include: Faulty fan control relay 1. Fan control relay harness is open or shorted. Circuit electrical connections poor. Faulty cooling fan 1. Faulty coolant temperature sensor. Fan cooling fan harness is open or shorted.

What’s the difference between p0480 and P0 482?

NOTE: P0480 speaks of the basic circuit, however codes P0481, and P0482 relate to the same problem with the only difference is they relate to the different fan speed relays. Check engine light (malfunction indicator lamp) illumination and code P0480 set

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