Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
Currently, the SI diagnostics do not mention the position 1 O2 sensor as a potential cause of a P0410 DTC.
If the SI diagnostics do not isolate the cause of a P0410 DTC, there is no sign of dirt or water in the AIR pump or relay, and proper AIR check valve operation is noted, replace the position 1 O2 sensor.
Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.
The Secondary Air Injection (AIR) System reduces exhaust emissions following initial engine start up. This occurs when the engine Start-up coolant temperature is between 3-50°C (37-122°F) and the intake air temperature (IAT) is more than 1°C (32°F). The AIR pump will operate until Closed Loop operation is achieved.
The powertrain control module (PCM) activates the AIR system by suppling a ground to the AIR pump relay and AIR solenoid relay simultaneously. This action closes the internal contacts of the AIR pump relay, energizing the AIR pump and also closes the internal contacts of the AIR solenoid relay, energizing the AIR solenoid, opening the shut-off valve. The AIR pump forces pressurized fresh air into the pipes/hoses and past the check valve into the exhaust manifold, accelerating catalyst operation. When the AIR system is inactive, the AIR shut-off valve prevents airflow in either direction.
The AIR system includes the following components:
The PCM can detect an AIR System airflow fault by monitoring the heated oxygen sensor (HO2S) bank 1 sensor 1 during normal engine operation. This is an active test. The PCM will command the AIR system ON during Closed Loop operation to perform this test. The active test will pass or fail based on the response from the HO2S 1. The active test consists of three tests run at 3-second intervals. A decreasing HO2S voltage parameter response indicates that the secondary AIR system is functioning properly. If the PCM does not detect a decreasing response from the HO2S 1, DTC P0410 will set.