Although the fault code P0002 usually refers to the same problem for all vehicles, it can be a symptom of a different fault in some makes and models. For this reason, if your vehicle has a diagnostic code P0002, be sure to check your vehicle’s service book.
With the spread of computer technology, they have become more technological in automobiles. Almost everything from the vehicle’s fuel delivery to the ignition timing is controlled by a computer. This computer is called the engine control unit (ECU). The sensors in the engine and its components continuously transmit information to the ECU. These received data are used by the brain to ensure that all functioning is accurate, economical and efficient.
What is a Fuel Volume Regulator? : The pressure of the fuel sent to the engine by the fuel pump may be low or low. This may disrupt the engine’s air/fuel ratio. For this reason, manufacturers have used a regulator to adjust the fuel. This is called a fuel pressure regulator. We can compare this piece to a tap. Although the pressure of the water coming from the pipe is constantly the same, as much water flows from the fountain as you turn the tap. Here the fuel volume regulator is also a kind of tap that provides fuel inflow to the engine. It is more often found in vehicles with diesel and GDI gasoline engines.
What is the Meaning of P0002 Fault Code : All sensors in the car are powered by electricity. The rotation of the reference signal sent by the ECU informs about the operation of the sensor or regulator. The circuit of the fuel volume regulator should be in the range of 1.5 to 5 volts. When your vehicle is idling, the voltage is 5 volts, and at the highest speed, that is, when the fuel is used the most, it is 1.5 volts. If the electrical signal to the ECU deviates from these values, a fault is considered to be a fault and the error code P0002 Fuel Volume Regulator Control Circuit Range/Performance is issued.
P0002 Fault Code Symptoms
- As with any sensor and regulator failure, the engine failure lamp lights up
- The engine may not start.
- Your car’s engine can switch to Limp Mode (protection mode).
- There may be a misfire in the engine with gas data.
- Fluctuation may occur at idling.
P0002 Fault Code Causes
- Fuel volume regulator solenoid failure
- A break, short circuit or opening in the regulator cables
- A blockage in the fuel line
- Faulty fuel pump
P0002 Error Code Repair, Fixes and Solutions
First of all, the first thing you need to do is read the technical books known according to the make and model of your vehicle. Because this can save you time and money. Then visually inspect the electrical wiring that comes to the fuel volume regulator circuit. If you see a peeling, opening, rupture or corrosion (blooming) in the cables, be sure to change the installation. Measure the regulator with the help of a voltmeter whether there is an electrical signal or not. However, using the direct battery voltage while doing this can cause greater damage to the system. If the error code P0002 continues to appear, you will need to change the fuel volume regulator.
Source : P0002 Fuel Volume Regulator Control Circuit Limit Performance Fault Code