What Causes Volvo Steering System Malfunctions?
2 Answers
There are several possible causes for Volvo steering system malfunctions: 1. Abnormal noises during steering. This may be caused by damage to the kingpin and bushings or failure of the column thrust bearing. You can turn left and right to identify the source of the noise before disassembling for inspection. 2. Steering gear oil leakage. Leakage typically occurs at three locations: the steering gear upper cover, the connection between the steering shaft and the pitman arm, and the side end cover. This is usually caused by deteriorated seals due to prolonged vehicle use. Since these areas all have sealing rings, replacing the oil seals and gaskets should resolve the issue. For leaks at other locations, it might indicate sand holes or cracks in the steering gear housing. Small gaps can be sealed with Loctite 290 high-permeability sealant, while larger gaps require component replacement. 3. Difficulty in steering wheel return. This issue usually stems from mechanical parts of the steering system, such as lack of lubrication causing damage to the steering knuckle kingpin and bushings, insufficient lubrication in the universal joint connecting the steering wheel and gear, or rusted tie rod ends - all requiring maintenance. 4. Heavy steering. Possible causes include steering gear failure, power steering pump malfunction, low fluid level, air in the system, failed seal rings in the two limit valves (causing fluid communication between piston chambers and loss of power assistance), or clogged return filter in the reservoir - all requiring troubleshooting and repair. 5. Power steering pump leakage. The first scenario involves leakage from the pump's rear cover due to damaged seal rings. The second, less noticeable situation shows as constantly decreasing fluid level in the steering reservoir requiring frequent refills.
I experienced a sudden heavy steering issue while driving my Volvo S60, and it was really unsettling! Later, I found out it could be due to an aging power steering pump leaking fluid, as older models still use hydraulic systems; or it might be a fault in the electronic power steering module, such as sensor failure or a short circuit, especially after rainy days when moisture can trigger these issues. During that visit to the repair shop, the mechanic scanned the error codes with a computer and fixed it by replacing the power steering fluid and the sensor. For regular maintenance, it's important to check the level and cleanliness of the power steering fluid to avoid prolonged issues leading to complete steering lock. For safety, if any fault occurs, never risk driving on highways—prompt professional inspection is crucial, as the steering system is vital for overall driving stability.
