Technical Description
Malfunction in the Secondary Air Injection System
What does that mean?
This diagnostic trouble code (DTC) is a generic powertrain code, which indicates that it is applicable to OBD-II equipped vehicles. Although it is a generic code, the specific repair steps may vary depending on the make and model of the vehicle.
The P0410 code pertains to the emissions system. The AIR pump introduces air into the exhaust system to reduce emissions. It draws in outside air and pumps it through two one-way check valves into each bank of the exhaust system.
In approximately 90% of cases where this code is set, the one-way check valves have become worn out or failed, allowing water (which naturally occurs in the exhaust) to flow back into the pump. In colder climates, especially those with higher humidity, the presence of water may be more significant. The water partially fills the AIR pump and can freeze. When the PCM (powertrain control module) commands the pump to turn on, it cannot do so if it is frozen, resulting in an overload of the circuit and blowing the fuse.
Other trouble codes related to the secondary air injection system include P0411, P0412, P0413, P0414, P0415, P0416, P0417, P0418, P0419, P041F, P044F, P0491, and P0492.
Symptoms
Possible symptoms include:
Causes
A code P0410 may indicate that one or more of the following has occurred:
Possible Solutions
Note: There is a technical service bulletin (TSB) available for a number of GM models regarding this code. The TSB recommends replacing the AIR pump and installing a new secondary injection hose. The TSB can be found on the ACDelco site.
In addition, if you simply replace the AIR pump, the problem may recur. Therefore, it is also advisable to clean out the hoses and replace the one-way check valve. If this issue pertains to a GM model covered by the TSB, it is recommended to follow the instructions provided in the aforementioned link. In some cases, individuals have created a small hole in the rubber cover of the pump to allow any water to drain out.
Furthermore, please be aware that this issue may be covered under the emissions warranty of the vehicle. If the vehicle is no longer covered by the bumper-to-bumper warranty, it is worth checking if the emissions warranty is still valid!
Sources: GM-Forums thread
