What causes P0480?
P0480 means that the cooling fan 1 control circuit has a malfunction. The vehicles ECU has tried to control the cooling fan 1 and it has failed to operate or a fault was detected. The ECU then triggers a Check Engine Light to illuminate on the dashboard.
What does P0480 mean?
Fan 1 Control Circuit
Diagnostic Trouble Code (DTC) P0480 stands for “Fan 1 Control Circuit.” The engine cooling fan system is controlled and monitored by your vehicle’s computer and various sensors. The PCM detects the temperature increase through the coolant temperature sensor.
What is a fan 2 control circuit?
Diagnostic trouble code (DTC) P0481 stands for “ Fan 2 Control Circuit.” Cooling fan relays control the power supplied to your engine’s cooling fans. If the engine temperature reaches a point that’s considered unsafe, the PCM will command one of the cooling fan relays to activate one of the fans.
How are electrical cooling fans controlled?
The fans are controlled either with a thermostatic switch or by the engine computer, and they turn on when the temperature of the coolant goes above a set point. They turn back off when the temperature drops below that point. Rear-wheel drive cars with longitudinal engines usually have engine-driven cooling fans.
What is code P0483?
The P0483 code is defined as “cooling fan rationality check malfunction.” It is usually triggered by your powertrain control module (PCM) when it detects that the current being drawn by the cooling fan control circuit is either too high or too low.
What temp should radiator fan turn on?
Your radiator fan should kick in at about 200 degrees Fahrenheit. If you notice your vehicle is overheating or at the very least running hotter than it normally does, listen for the fan to see if you can hear it.
Should both radiator fans be on?
On many vehicles, there may be two fans: a main cooling fan for the radiator, and a second fan for the condenser. Both fans should come on when the A/C is on.
How do I fix code P0483?
How To Correct P0483 Cooling Fan Rationality Check Malfunction
- Begin with the inspection of cooling fan motor by performing voltage and a ground test on it.
- Replace all the faulty fuses.
- Repair or replace all the defective relays and circuitry within the system.
- Replace the faulty coolant temperature sensor.
What does a sub fan relay do?
The cooling fan relay is an electromagnetic switch that controls the power supply to the engine’s cooling fans.
At what temperature should radiator fan kick in?
about 200 degrees Fahrenheit
Your radiator fan should kick in at about 200 degrees Fahrenheit. If you notice your vehicle is overheating or at the very least running hotter than it normally does, listen for the fan to see if you can hear it.