Verification of Vehicle Repair

Engine Control
P0128 Coolant Thermostat (Coolant Temperature below Thermostat Regulating Temperature) - Verification of Vehicle Repair

Verification of Vehicle Repair

After a repair, it is essential to verifying that the fault has been corrected.
1. Connect scantool and select "DTC" button.
2. Press "DTC Status" button and confirm that "DTC Readiness Flag" indicates "Completed". If not, drive the vehicle within conditions noted in the freeze frame data or enable conditions.
3. Read "DTC Status" parameter.
4. Is parameter displayed "History(Not Present) fault"?