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.
How do you fix trouble code P0480?
How To Correct P0480 Cooling Fan Relay 1 Control Circuit
- Repair or replace the faulty cooling fan 1.
- Replace the frayed vehicle speed sensor.
- Replace the inoperative AC pressure switch.
- Repair the faulty electrical connections.
- Repair or replace the defective fan wiring harness.
- Replace the engine coolant temperature sensor.
What can cause a P0480 code?
Code P0480 is set when your PCM detects a potential problem with the engine’s electric cooling fan or its control circuit.
What is a fan control circuit?
Fan-control circuits range from simple switches that boost the fan speed at a certain temperature, to digitally controlled fans with continuously-variable speed. High-speed/low-speed switches are inexpensive, but the sound of sudden speed changes can be annoying.
What are the symptoms of a faulty cooling fan switch?
Common signs include engine overheating, the Check Engine Light coming on, and a broken or shorter signal wire.
What is a cooling fan relay?
A cooling fan relay is used on vehicles that have an electrical fan to cool the engine. The function of the cooling fan relay is to convert a low voltage signal from either the electronic control module (ECM) or a thermostatically controlled sensor.
Where is coolant temperature sensor?
In most cars, the primary ECT sensor (ECT sensor 1) is installed near the thermostat in the cylinder head or block or on the thermostat housing. A second coolant temperature sensor could be installed in another part of the engine, or in the radiator.
What is the engine coolant temperature sensor?
The coolant temperature sensor, abbreviated as CTS, in your car is an important device that enables the control unit to give alerts if the engine is overheating or if the temperature within the system is rising for some reason.
How are electrical cooling fans controlled?
The PCM controls fan operation; it uses the signal from the ECT or engine coolant temperature sensor. This sensor senses the temperature of the engine’s coolant and sends a variable voltage signal to the PCM. The PCM operates the fan motor through the engine’s cooling fan relay.
Why my fan regulator is not working?
Switch on the fan again. If it still does not start, use a voltage tester and confirm power supply is reaching the fan motor. If that is an issue, check for faulty switch or regulator which can be replaced. If all is working and the issue persists, more than often, the capacitor needs replacing.
Where do fan controllers plug in?
The fan controller controls the fans on its own, see the controls behind the front door. There is no way you can get it to work with the motherboard. The 4-pin connector needs to be connected to one of your power supply’s 4-pin molex connectors.
Which circuit can be used for speed control of fan?
TRIAC: TRIACs are the components used in controlling the AC signals. They are used in multiple applications where high-power switching is required in AC waveforms. TRIACs are generally used in AC dimmer circuits and come in very handy when trying to control the speed of a fan or as a dimmer to the LED bulb.
How is P0128 diagnosed?
The most common cause for P0128 is the engine coolant thermostat is stuck open. A simple way to diagnose this is to feel the radiator hose and monitor how hot the temperature of the coolant is when it starts flowing through the radiator hose.
What does error code P0128 mean?
The P0128 code means that the engine coolant is not getting warm enough, fast enough. In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. The Engine Control Module (ECM) determines this length of time based on ambient temperature.
What is code P0483?
P0483 code definition
The presence of the P0483 code in the PCM indicates that the PCM is detecting a voltage reading that is either too high or too low in the electrical cooling fan control circuit.