Diagnostic Procedures
- Perform On-Board Diagnostic (OBD) System Check. After performing OBD system check, go to next step.
- Allow engine to completely cool. Install scan tool. Turn ignition on. Using scan tool, monitor intake air temperature and engine coolant temperature values. Compare values. If values are the same, go to next step. If values are not the same, go to DTC P0117.
- Start and run engine. Monitor engine coolant temperature using scan tool. If engine coolant temperature steadily rises to greater than 95°F (35°C) within 9 minutes, see DIAGNOSTIC AIDS. If engine coolant temperature does not steadily rises to greater than 95°F (35°C) within 9 minutes, go to next step.
- Check cooling system coolant level. If a problem was found, repair cooling system. If a problem was not found, go to next step.
- Compare engine coolant temperature displayed on scan tool to actual coolant temperature. If values are about the same, repair cooling system. If values are not about the same, go to next step.
- Replace ECT sensor. Go to next step.
- Using scan tool, select DTC, CLEAR INFO. Start and warm engine to normal operating temperature. Select DTC, SPECIFIC, then enter DTC P0125. Operate vehicle within the conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, repeat step 2).
- Using scan tool, select CAPTURE INFO, REVIEW INFO. If any undiagnosed DTC(s) are displayed, go to applicable DTC test.