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.
Where is the cooling fan relay located?
The fan relay is usually located near the bottom of the engine compartment on a metal frame member. The metal acts as a heat sink to keep the fan relay cool. So, unplug the connector at the relay and repeat the check for power. If you get power, you’ve got a bum relay.
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.
How do I fix the cooling fan 2 control circuit malfunction?
The most common potential repairs to address the P0481 code are as follows:
- Inspect the electrical connections to the cooling fan and relay to insure they are attached.
- Disconnect it, inspect the connections for corrosion or other issues, and then reinstall to insure a fresh electrical connection.
What does fan 1 control circuit mean? – Related Questions
What can cause a P0480 code?
What causes the P0480 code?
- Faulty cooling fan 1.
- Poor electrical connection in the fan circuit.
- Failed fan control relay has failed.
- Failed coolant temperature sensor.
- Faulty AC pressure switch.
- VSS not operating properly.
What sensor controls the cooling fan?
On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor.
What happens if you unplug the coolant temp sensor?
If you unplug the sensor when the engine is cold the engine may run smoothly at first but as the engine warms up the a/f mix will become too rich and the engine will start misfiring and possibly stall.
What happens when the coolant temperature sensor goes out?
If the coolant temperature sensor malfunctions, it can transmit a false signal to the computer. And the response of the computer may unbalance the timing and fuel calculations. It is also common for a coolant temperature sensor to fail without warning and send permanently cold signals to the computer.
Where is the cooling temperature sensor located?
The coolant temperature sensor will be located directly behind the coolant pipe. In most modern cars and vehicles, this is present behind the right cylinder head that is located right underneath the air intake pipe. Will a malfunctioning Coolant Temperature Sensor cause a check engine light?
What is the fan 2 control circuit?
OBD-II Code P0481 is defined as a Fan 2 Control Circuit. This trouble code refers to the engine cooling fan circuit, as it experiences a malfunction causing the fan to fail, which then leads to engine to overheat.
How do you fix a malfunctioning fan?
Here’s how to get started to see if a simple fix is within reach to make your fan work again.
- Check the Cord.
- Check Your Circuit Breaker.
- Check for Power to Your Outlet.
- Check the Fan Fuse.
- Replace the Cord.
- Clean the Fan.
- Grease the Motor.
- Call Customer Support.
What causes a fan to malfunction?
The main causes of failure are loss of lubricant, a failed run capacitor, a failed bearing in a belt drive, a little water dripping into the windings or a voltage problem.
How do I control a 2 wire fan?
A 2-wire fan is controlled by adjusting either the dc voltage or pulse width in low-frequency PWM. However, with only two wires, a tach signal is not readily available. This means that there is no indication as to how fast the fan is running—or indeed, if it is running at all. This form of speed control is open-loop.
What color wire controls the fan?
Black wire is for the fan. Blue wire is for the lamp if one is included with the fan. White wire is neutral. Green wire is for the ground.
Can you use a 4 pin fan on a 2 pin connector?
Yes, the fan will work, but the speed of the fan won’t be controlled by the motherboard because the voltage can’t be controlled via just the two pins. Keeping thing simple.
Can a fan work with 2 blades?
Fans with 2 blades offer the same ability to adjust the home’s temperature by simply moving the air, but they do with the updated style and modern grace.
Is a 52 inch fan too big for a 12×12 room?
Buy the Right Size
Select a fan with the appropriate span: 36 inches for rooms up to 100 square feet, 42 inches for up to 200 square feet, 52 inches for up to 400 square feet, and either one 60-inch fan or two 52- or 56-inch fans for rooms larger than 400 square feet.
Are plastic or metal fan blades better?
However, neither metal nor plastic fans cool better than the other. This is because, in terms of cooling a room, the number of fan blades, the diameter, and the number of rotations determines how effectively a ceiling fan cools a room.
Is a 5 blade fan better than a 4 blade fan?
There is a common misconception that five ceiling fan blades work better than four or even three blades. Homeowners assume that five blades means better air movement, circulation, and less cooling costs, but in reality, all five blades do is add aesthetic appeal.
What kind of ceiling fan pushes the most air?
The first thing to be aware of is the shape of the blade. Fans with a traditional, oar-shaped blade will move the most air. A wider, larger blade may look like it would be more powerful, but the added size drags through the air, slowing the motor down. Blade pitch also affects air movement.