What are the causes of abnormal rail pressure?

[LeMarcus]

Engine rail pressure abnormality is caused by a malfunction of the engine's pressure switch (sensor). The following are other causes and solutions: Solutions: If the pressure switch sensor of a Foton Cummins engine fails, promptly visit a 4S shop or repair shop to inspect and repair the vehicle's switch sensor to resolve the issue of abnormal engine rail pressure. Fixed deviation faults mainly refer to a type of fault where the sensor's measured value differs from the true value by a constant. The faulty measurement runs parallel to the fault-free measurement. Other causes: Drift faults are a type of fault where the difference between the sensor's measured value and the true value changes over time. Precision degradation occurs when the sensor's measurement capability deteriorates, leading to lower accuracy. When the accuracy level decreases, the average value of the measurements does not change, but the variance of the measurements does.