Peugeot 3008 Power Steering Issue

I have a Peugeot 3008 as well, though I'm unsure of the year. I had similar symptoms: vibrating steering wheel and increased steering effort, especially at lower speeds. It was a faulty connection in the power steering system. The cable to the steering pump had corroded, causing intermittent power. Check those cables and connections thoroughly. The steering pump provides the hydraulic pressure, so a defect there can cause your symptoms. Also, check the pressure hose; if it's leaking, the steering feel can get spongy.

Could you tell me exactly where the corroded cable connection was located in your case? Knowing that would help me diagnose it before I visit a workshop.

As I recall, the connection was near the steering rack. It supplies power to the electric motor that assists the steering. If that connection is damaged, you can have the described issues. Given the error memory and symptoms, I'd advise against DIY repairs unless you have extensive experience with automotive electrical systems. A qualified workshop would be safest for diagnosis and repair.

Thanks for the detailed explanation. I took it to a certified Peugeot workshop, and the cable connection was indeed defective, as suspected. The repair, including replacing the cable, cost 95€.