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P0128 - Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
P0410 - Secondary Air Injection System Malfunction (has to do with exhaust system)
Note: There is a technical service bulletin (TSB) regarding code P0410 for a
number of GM models. The TSB calls for the replacement of the AIR pump and the
installation of a new secondary injection hose.
P0410 Secondary Air Injection System Malfunction I am very familiar with this failure code, you are going to have to replace the secondary air injection pump, it has a failed motor in it, the code really indicates no airflow from the pump when commanded to be on.