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Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Engine Controls - Self-Diagnostics - 2.5) >> Diagnostic Tests >> DTC P0125: Insufficient Engine Coolant Temperature For Closed Loop Fuel Control >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Nissan Sentra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove ECT sensor, and place in heated water. Measure resistance between sensor terminals, with water at specified temperatures. See ECT SENSOR RESISTANCE  for specifications. If resistance is as specified, go to next step. If resistance is not as specified, replace ECT sensor.
  2. Allow engine to cool to less than 158°F (70°C). Start engine. Grasp lower radiator hose to check for coolant flow. If coolant is flowing, replace thermostat. If coolant is not flowing, go to next step.
  3. No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
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