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EC-210 < DTC/CIRCUIT DIAGNOSIS > [VQ35DE] P0125 ECT SENSOR P0125 ECT SENSOR DTC Logic INFOID:0000000009178138 DTC DETECTION LOGIC NOTE: • If DTC P0125 is displayed with P0116, first perform the trouble diagnosis for DTC P0116. Refer to . • If DTC P0125 is displayed with P0117 or P0118, first perform the trouble diagnosis for DTC P0117, P0118. Refer to . DTC CONFIRMATION PROCEDURE 1. PRECONDITIONING If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct- ing the next test. 1. Turn ignition switch OFF and wait at least 10 seconds. 2. Turn ignition switch ON. 3. Turn ignition switch OFF and wait at least 10 seconds. >> GO TO 2. 2. CHECK ENGINE COOLANT TEMPERATURE SENSOR FUNCTION With CONSULT 1. Turn ignition switch ON. 2. Select “DATA MONITOR” mode with CONSULT. 3. Check that “COOLANT TEMP/S” is above 10 °C (50°F). With GST Follow the procedure “With CONSULT” above. °C (50°F)? YES >> INSPECTION END NO >> GO TO 3. 3. PERFORM DTC CONFIRMATION PROCEDURE With CONSULT 1. Start engine and run it for 65 minutes at idle speed. If “COOLANT TEMP/S” increases to more than 10 °C (50°F) within 65 minutes, stop engine because the test result will be OK. CAUTION: Never overheat engine. 2. Check 1st trip DTC. With GST Follow the procedure “With CONSULT” above. YES >> NO >> INSPECTION END Diagnosis Procedure INFOID:0000000009178139 1. CHECK ENGINE COOLANT TEMPERATURE SENSOR DTC No. CONSULT screen terms (Trouble diagnosis content) DTC detecting condition Possible cause P0125 ECT SENSOR • Voltage sent to ECM from the sensor is not practical, even when some time has passed • Engine coolant temperature is insufficient for closed loop fuel control. • Harness or connectors (High resistance in the circuit) • Engine coolant temperature sensor |