Engine Controls - Revised DTC P0125 Diagnostics
Group: 36 - ENGINE ELECTRICALNumber: 03-36-006
Date: 05-2003
Model: Sonata 2002
Subject:
2002 SONATA DTC P0125 DIAGNOSTIC INFORMATION CORRECTION
This bulletin supersedes TSB # 02-36-016-1 and TSB # 02-36-016.
DESCRIPTION:
The diagnostic information for Diagnostic Trouble Code (DTC) P0125 in the 2002 SONATA Shop Manual pages listed below is inconsistent.
AFFECTED MANUAL AND PAGE
This bulletin corrects the conflicting information for the diagnostic trouble code descriptions, trouble areas to check and troubleshooting guides for DTC P0125.
CORRECTION TO DTC P0125
DESCRIPTION:
The engine coolant temperature sensor (ECTS) is located in the engine coolant passage of the cylinder head for detecting the engine coolant temperature. The ECTS uses a thermistor whose resistance changes with the temperature. The electrical resistance of the ECTS decreases as the temperature increases and increases as the temperature decreases. During cold engine operation, the ECM increases the fuel injection duration and controls the ignition timing using the information of engine coolant temperature to improve driveability.
TROUBLESHOOTING GUIDE
TROUBLESHOOTING FOR DTCS (MELCO EMS) FL-139
Circuit Diagram
TEST PROCEDURE