P0201 Injector Circuit Malfunction (Cylinder 1) — Causes & Fix

What Does P0201 Mean?

P0201 is a generic OBD-II code indicating the Engine Control Unit (ECU) has detected an electrical fault in the fuel injector circuit for cylinder 1. This could be an open circuit, short circuit, or incorrect resistance in the injector solenoid or its wiring. The ECU may disable fuel delivery to cylinder 1, causing the engine to run on three cylinders.

P0201 at a Glance

• What it means: The ECU has detected a fault in the fuel injector electrical circuit for cylinder 1.
• Most common cause: Faulty injector, wiring damage, or ECU driver fault.
• Severity: Moderate to serious — causes misfire on cylinder 1.
• Can you drive?: Short distances only. Prolonged driving risks DPF and catalytic converter damage.
• Typical repair cost: £100-£350 for injector replacement; £40-£100 for wiring repair.