What are the reasons for the failure of the fuel pressure sensor function?

[LondynLee]

Fuel pressure sensor function failure may occur due to the following reasons: 1. Malfunction of the fuel pressure sensor: In this case, fuel pressure pre-regulation replaces fuel pressure regulation. The fuel pressure is approximately 6.5 bar. If the low fuel pressure remains insufficient for a long time, it may lead to abnormal wear of the fuel pressure regulator valve, causing it to stick, which in turn results in the failure of the fuel pressure sensor function. 2. Failure of the high-pressure fuel sensor: The fuel system cannot establish high pressure. The engine operates in low-pressure fuel emergency mode, leading to a loss of power and torque. 3. The fuel pressure sensor cannot detect pressure: The fuel pressure sensor detects changes in the fuel line pressure. If it is damaged, it cannot detect fuel pressure, and the engine control unit cannot adjust the fuel pressure according to operating conditions. This may cause symptoms such as poor acceleration and difficulty starting.

[Stewart]

The reasons for fuel pressure sensor failure, based on my decades of experience in the garage, mainly boil down to aging issues. The sensor itself operates in a high-temperature, high-pressure oil environment for extended periods, leading to wear or corrosion of internal circuit components, which can cause signal distortion or complete failure to output. Common scenarios include loose or broken wiring connections—if the plug isn't securely fastened or is covered in oil residue, the signal can't be transmitted. Contaminants in the fuel system, such as dirt entering the sensor port, can also interfere with pressure detection. Improper installation is another factor, like loose mounting screws causing the sensor to shift under vibration. Unstable voltage supply is another risk; when the battery power is abnormal, the sensor may misinterpret data. Remember, these issues don't just affect fuel consumption but also disrupt engine performance, and prolonged neglect can increase repair costs. It's best to regularly clean the fuel system to prevent contaminant buildup, which can extend the sensor's lifespan.

[GeorgeLee]

The oil pressure sensor malfunctioning, based on my experience from repair shops, is commonly caused by wiring harness issues. Short circuits or open circuits are frequent, especially when the connecting wires between the sensor and the ECU age or get crushed, interrupting the signal. Additionally, internal component damage in the sensor, such as diaphragm rupture due to vibration or corrosion affecting signal collection, can occur. Oil pressure system leaks can also cause abnormal pressure, making the sensor unable to read data accurately. Voltage issues are equally important, as unstable power supply may burn out the sensor circuit. During inspection, it's recommended to first test the wiring resistance and voltage, using a multimeter to check if they are within normal ranges. Before replacing the sensor, ensure the entire system is free of debris and blockages, as maintaining cleanliness is key to prevention. These steps can help avoid misdiagnosis, saving both time and money.

[DiMarcus]

I believe oil pressure sensor failures often stem from daily wear and tear. The sensors operate in high-temperature, high-pressure oil environments, and over time, internal components like piezoresistors can degrade. Oil contamination blocking ports is also common, such as gasoline impurities accumulating and affecting accuracy. Loose or corroded wiring connectors can lead to poor contact. Voltage instability may potentially burn out the sensor. For prevention, regularly cleaning the fuel system and inspecting connectors can reduce issues. Prompt replacement of faulty components ensures driving safety.