How to Solve the P0481 Fault Code?

Fault**P0481 Radiator Fan Relay 2 Control Circuit Fault. The left and right side fans work normally at low speeds, and the left side does not rotate at high speeds. The inspection found that the No. 21 high-speed electronic fan fuse (15A) was blown.

There is no short circuit in the line. Cause of failure: Due to the difference in the resistance of the left and right electronic fans (the resistance of the left electronic fan is ohms, and the resistance of the right electronic fan is ohms), their starting current is also different (the starting current of the left electronic fan is 35A, and the starting current of the right electronic fan is.

Once the wire plugs of the two electronic fans are reversed, the high-speed electronic fan fuse (15A) will blow due to the large starting current of the left electronic fan. Solution: Correctly plug in the wire plugs of the two electronic fans.

Fault code P0481 is detailed as follows: System Fault Range: Emission Control.

Applicable models: All car manufacturers.

Engine cooling fan 2 - control circuit.

English meaning: Not at the moment.

1.Location and function of the cooling fan relay on the vehicle: a).

The cooling fan relay is located in the engine relay box. b) The function of the cooling fan relay controls the normal operation of the cooling fan under various working conditions. 2.

Type, structure, principle and influence of cooling fan relay: a). The cooling fan relay is a four-wire system, of which two wires are ground wires and one line is the power line, which is regarded as the control line.

b) The cooling fan relay is an important part of the power system control module to control the normal operation of the cooling fan according to the water temperature.

Causes and effects of failures:1. Fault code explanation: The function of the cooling fan is to cooperate with the radiator to dissipate heat.

When the fan rotates, it sucks in air to pass it through the radiator, thereby enhancing the heat dissipation capacity and accelerating the cooling of the coolant to achieve the purpose of heat dissipation. Fault Table: There is a fault in the control circuit of the cooling fan on the fast surface.

Suggested Solution:1. Failure Reason a).

Check the cooling fan b) for foreign objects around it. Whether the rotary fan is stuck c). Whether the coolant temperature sensor and its circuit are faulty d).

whether the cooling fan and its circuitry are faulty). Whether the electronic control unit is faulty2. Method A).

Check if there is any foreign object around the cooling fan, rotate the fan to see if it is stuck, and if so, clean or replace it. If the Zhengchang drupe failure is not solved or there are other faults, please call professional and technical personnel. b) Pay attention to clean up leaves, branches and other debris in the engine compartment to avoid getting involved in the fan and damaging the cooling fan.

Millions of car purchase subsidies.

The fault code P0488 is detailed as follows: System Fault Range: Emission Control.

Applicable models: All car manufacturers.

Chinese meaning explanation: exhaust gas recirculation throttle control circuit a range performance failure.

English meaning: Not at the moment.

1.Position and function of exhaust gas recirculation sensors on vehicles: a).

The exhaust gas recirculation sensor is typically integrated with the exhaust gas recirculation valve spine and is located on the right side of the intake manifold, near the throttle body. b) The exhaust gas recirculation sensor is used to detect the opening of the exhaust gas recirculation valve and send a signal to the power system control module to determine the amount of exhaust gas recirculation. 2.

Type, structure, principle and influence of exhaust gas recirculation sensor: a). The exhaust gas recirculation sensor is a three-wire system with a 5V power line, a ground wire, and a signal line.

b) The exhaust gas recirculation sensor is a variable resistor (potentiometer). c) The exhaust gas recirculation sensor is an important signal information for reducing emissions and fuel consumption.

Causes and effects of failures:1. Fault**ExplanationThe function of an exhaust gas recirculation (EGR) system is to introduce a small amount of exhaust gases into the intake manifold under specific conditions of engine operation.

The presence of these exhaust gases reduces the temperature and pressure of the combustion chamber, thereby reducing the emission of nitrogen oxide pollutants. This fault occurs when the electronic control unit (ECU) detects a macro-error in the control circuit of the exhaust gas recirculation valve**.

Suggested Solution:1. Failure Reason a).

Whether the exhaust gas recirculation (EGR) system piping is ruptured and leaking (if there is a leak, there is usually an abnormal noise); b) Whether the solenoid valve of the exhaust gas recirculation system is aged or damaged; c) Whether there are defects in the air pump, diverter valve, check valve, pressure relief valve, etc. of the exhaust gas recirculation system; Whether there is a short circuit, open circuit or poor contact between the solenoid valve and its circuit of the EGR system; e) Whether the sensors affecting the exhaust gas recirculation (EGR) system are abnormal (e.g. inlet pressure, coolant temperature, oxygen sensor, etc.). ) Whether ecu2 is faulty. Method A).

Inspect exhaust gas recirculation (EGR) system piping for cracks or leaks, and if so, repair or replace. If the fault is not solved or there are other faults, please call a professional technician. b) Pay attention to cleaning the empty air filter regularly.

If the vehicle wades in water frequently, the valves of the exhaust gas recirculation (EGR) system may rust and get stuck due to the moisture inhaled, so the vehicle should try to avoid wading.

Millions of car purchase subsidies.