Scantool Diagnostics
P0128 Coolant Thermostat (Coolant Temperature below Thermostat Regulating Temperature)
Scantool Diagnostics
Monitor GDS Data
1. Connect GDS to Data Link Connector (DLC)
2. Warm up the engine to normal operating temperature.
3. Monitor "ECTS" parameter on GDS.
4. Is the "ECTS" parameter displayed correctly?