What causes the abnormal noise when turning the steering wheel of a Volvo S90?

[StTeagan]

1. Abnormal noise when turning the steering wheel while stationary: This is likely caused by the friction between the horn wire transmission spring steel plate and the steering wheel. The sound usually comes from inside the car and is a rustling metal friction noise. The solution is to apply some lubricating oil at the friction point between the spring steel plate and the steering wheel. 2. If the abnormal noise occurs while driving: The sound usually comes from the front suspension outside the vehicle. If it's a sharp squeaking sound, it may be due to excessive or insufficient front wheel toe-in, causing tire scrubbing noise when the front wheels don't turn parallel during steering. If it's a clicking or rattling sound, it indicates excessive wear of the car's half-shaft CV joint, which needs replacement. Typically, noise when turning left indicates damage to the right-side CV joint.