Posts Tagged: P0411 Equinox and Terrain

P0411 Equinox and Terrain

August 11, 2022

P0411 on Equinox and Terrain Diagnose and fix Equinox and TerrainP0411 P0411: Secondary Air Injection System Incorrect Air Flow Detected Diagnostic steps Using a scan tool with live data, monitor the Air Injection Reaction (AIR) solenoid sensor data. There are two voltages to monitor; 1-2 and 3-4. When the AIR solenoid is off, look for voltages between 2.5-2.7 volts. Use the bi-direction scan tool to activate the AIR solenoid; voltage should rise to 3.3 volts on both sensors. Start the AIR pump using the scan tool or using jumper wires … Read More