Code Definition

P0625 — Alternator field coil circuit Iow

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

About P0625

P0625 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 P0625 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 P0625 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 P0625 fault code is set when the Engine Control Module (ECM) or Powertrain Control Module (PCM) detects a low voltage condition in the alternator field coil circuit. This circuit is crucial for the operation of the alternator, as it helps regulate the alternator's output by controlling the strength of the magnetic field inside the alternator. A low voltage condition in this circuit can indicate an issue with the alternator's ability to generate adequate power, potentially leading to insufficient charging of the vehicle's battery.

Quick Facts