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

1 Answers

LondynLee

07/29/25 10:21pm

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.

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