Common faults in the power steering system include stiff steering, abnormal noise, oil leakage, and power assist failure. Stiff steering is usually caused by hydraulic power pump failure, steering rack wear, or low fluid level in the system, requiring inspection of the fluid condition and replacement of damaged components. Oil leakage commonly occurs at sealing parts like the upper cover and side end cover of the steering gear; replacing the oil seal or sealing ring can solve the problem, but if there are casting defects in the housing, professional sealing is required. Power assist failure may be due to steering fluid leakage, oil pump failure, or air ingress into the system, manifesting as abnormally stiff steering wheel operation, which requires timely air purging and replenishment of steering fluid. In daily maintenance, the fluid level should be checked regularly, and the steering wheel should not be held at full lock position to prevent system overload. If the steering warning light is illuminated (yellow indicates partial failure, red indicates complete failure), the alternator, power steering pump, and hydraulic lines should be inspected immediately, with damaged components replaced as necessary. It is noteworthy that steering system faults are often accompanied by abnormal tyre wear or suspension issues, so comprehensive diagnosis is recommended to ensure driving safety and handling stability.
