DTC Troubleshooting: P0126 (86-3)

DTC P0126: Insufficient Engine Coolant Temperature Check the ECT SENSOR in the DATA LIST with the HDS. Is about 20 °C (68 °F) or less indicated?
YES | - | Go to Step 2 .
NO | - | Intermittent failure, system is OK at this time. Check the thermostat and the cooling system.■
Start the engine, and let it idle 20 minutes. Check the ECT SENSOR in the DATA LIST with the HDS. Is about 20 °C (68 °F) or less indicated?
YES | - | Go to Step 4 .
NO | - | Intermittent failure, system is OK at this time. Check the thermostat and the cooling system.■
Turn the ignition switch OFF. Replace the ECT sensor. Turn the ignition switch ON (II). Reset the ECM with the HDS. Allow the engine to cool below 20 °C (68 °F). Start the engine, and let it idle 20 minutes. Check for Temporary DTCs or DTCs with the HDS. Are any Temporary DTCs or DTCs indicated?
YES | - | If DTC P0126 is indicated, check for poor connections or loose terminals at the ECT sensor and the ECM, then go to Step 1 . If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO | - | Go to Step 11 .
Monitor the OBD STATUS for DTC P0126 in the DTCs MENU with the HDS. Does the screen indicate PASSED?
YES | - | Troubleshooting is complete.■
NO | - | If the screen indicates FAILED, check for poor connections or loose terminals at the ECT sensor and the ECM, then go to Step 1 . If the screen indicates NOT COMPLETED, go to Step 8 and recheck.