DTC P0125-A: Closed Loop Temp Not Reached

NOTE: For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.

This test procedure is not valid if thermostat is stuck open. If thermostat is operating correctly, go to next step. If thermostat is not operating correctly, replace thermostat. Perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES .
CLOSED LOOP TEMP NOT REACHED DTC sets if engine temperature does not rise to more than 60°F (16°C) within 10 minutes after engine is started. Possible causes are: thermostat failure, Engine Coolant Temperature (ECT) failure, extremely cold ambient temperature conditions, Powertrain Control Module (PCM) failure, faulty connections or wiring. Go to next step.
Run engine until engine coolant temperature is more than 80°F (27°C). Turn ignition off. Disconnect PCM connector. Inspect PCM connector for damaged or pushed out terminals. Repair PCM connector as necessary. Perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES . If PCM connector is okay, go to next step.

NOTE: Coolant temperature must be more than 80°F (27°C) before performing next step.

Using an ohmmeter, connect one ohmmeter lead to PCM connector terminal No. 26 (ECT sensor signal circuit). Connect other ohmmeter lead to PCM connector terminal No. 43 (ECT sensor ground circuit). See PCM CONNECTOR WIRE IDENTIFICATION table. If resistance is less than 11 k/ohms, go to next step. If resistance is 11 k/ohms or more, replace ECT sensor. Perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES .
Turn ignition off. Disconnect PCM connector. Inspect PCM connector for damaged or pushed out terminals. Repair PCM connector as necessary. Perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES . If PCM connector is okay, replace PCM. Perform TEST VER-5A: ROAD TEST FOR OBD-II TROUBLE CODES .

PCM CONNECTOR WIRE IDENTIFICATION