Code Definition

P0627 — Fuel Pump Control Circuit / Open

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

About P0627

P0627 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 P0627 is stored, the module has detected an open (broken or disconnected) electrical path in the monitored circuit.

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 P0627 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 P0627 code is set when the Engine Control Module (ECM) or Powertrain Control Module (PCM) detects an open circuit in the fuel pump control circuit. On many vehicles the ECM controls the fuel pump through a relay or a dedicated fuel pump driver module rather than powering the pump directly. An open in this control circuit, whether in the wiring, a connector, the relay, or the driver module, prevents the pump from being commanded correctly. Depending on where the open is, symptoms range from a long crank, a no start, or stalling to no obvious change if the fault is intermittent, and the malf...

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