What can cause a vehicle to pull to one side while driving?

A vehicle pulling to one side during driving is primarily influenced by factors related to the tires, alignment, and suspension system. Uneven tire pressure can create significant differences in rolling resistance between the left and right sides of the vehicle, causing it to veer toward the side with lower pressure.

Additionally, issues with wheel alignment, where the angles of the wheels are not set to the manufacturer's specifications, can lead to uneven tire wear and steering difficulties, further contributing to the pulling. Suspension component failures, such as worn control arms or struts, can also affect the vehicle's handling and stability, leading to a tendency to drift to one side.

In contrast, the other options do not directly relate to maintaining directional stability. Worn brake pads can affect stopping performance but typically do not cause a pulling sensation during regular driving. Low fuel levels might impact engine performance but do not inherently influence directional control. Faulty engine performance may manifest in driving characteristics but is not a common cause of a sideways pull while driving.