Code Definition

P0233 — Fuel Pump Secondary Circuit Intermittent

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

About P0233

P0233 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 P0233 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 P0233 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 P0233 fault code is set when the Engine Control Module (ECM) detects intermittent readings or signal disruptions in the secondary circuit of the fuel pump. The secondary circuit generally refers to the wiring and connections from the fuel pump relay to the fuel pump. Intermittent issues in this circuit can cause inconsistent fuel delivery to the engine, potentially leading to symptoms like engine stalling, hesitation, or difficulty in starting the engine. Causes of these intermittent signals can include loose or corroded connections, damaged wires, a faulty fuel pump relay, or issues with ...

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