Code Definition

P0204 — Injector Circuit Malfunction - Cylinder 4

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

About P0204

P0204 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 P0204 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 P0204 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 P0204 fault code is set when the Engine Control Module (ECM) detects a malfunction in the injector circuit of Cylinder 4. This specific code points to an issue with the fuel injector or its control circuit for Cylinder 4. Fuel injectors are essential for injecting the right amount of fuel into the combustion chambers of the engine. Any malfunction in the injector circuit can disrupt the fuel delivery to Cylinder 4, resulting in problems such as engine misfires, irregular engine performance, higher emissions, and decreased fuel efficiency. The cause of this fault could be a defective inject...

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

Quick Facts