GM Repair Questions? Ask a Mechanic for Answers ASAP
Hello & welcome to JA,
The p0410 is a fault code that sets when the computer does not recognize that the secondary air injection pump is running when the engine is cold to aid in a rich condition for "cold engine operation". The PCM looks at the 0/2 sensors for these changes. This problem is usually a faulty secondary air injection pump. The system should be tested before replacing the pump to confirm problem.
Secondary Air Injection Pump Replacement
Additional information you may consider:
Water was found in the fresh air line leading to the air pump and frozen water found in the return line. The air pump had frozen water in it and would not activate. All water/ice was cleared from the pump. Is this an indication of a faulty air pump? Also, I will add that my mileage is only 71K. Would there possibly have been a defective air pump from the manufacturer since mileage is under 100K? Please advise...thanks.