Code Definition

P0201 — Injector Circuit Malfunction - Cylinder 1

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0201

P0201 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0201 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0201 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0201 fault code is set when the Engine Control Module (ECM) detects a malfunction in the injector circuit of Cylinder 1. This code indicates that there is a problem specifically with the fuel injector or its control circuit for Cylinder 1. Fuel injectors are crucial for delivering the correct amount of fuel into the engine's combustion chambers. A malfunction in the injector circuit can affect fuel delivery to Cylinder 1, leading to issues such as engine misfires, uneven engine running, increased emissions, and reduced fuel efficiency. Causes could include a faulty injector, wiring or con...

Join TaT to view the complete code information and diagnostic details.

Quick Facts