The engine is not reaching proper operating temperature.
Informational only. Consult a qualified mechanic.
Replace the thermostat and check coolant level.
The P0125 OBD-II diagnostic trouble code (DTC) indicates: insufficient coolant temperature. This is a low-severity powertrain code that your vehicle's onboard diagnostics system triggers when the engine is not reaching proper operating temperature. If your check engine light is on with this code, the vehicle is generally safe to drive, but you should have it inspected soon.
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