Android 2019 - P0411 Code, P0411 secondary air injection system incorrect flow detected, P0411 description. an air pump is used on the vehicle to lower tail pipe emissions on start-up. the powertrain control module () grounds the air pump relay control circuit which energizes the air pump. the also grounds the air combination valve vacuum control solenoid circuit, which energizes the air vacuum control solenoid.. Error code p0411 - secondary air injection incorrect flow, Overview. error code p0411 is described as secondary air injection incorrect flow detected. definition. secondary air injection is actually an emission control that .. P0411 - obd-ii trouble code | bestride.com, P0411 secondary air injection system incorrect flow detected indicator. the pcm has detected a problem in the secondary air injection system. the secondary air injection system uses ambient air, which is pumped into the engine exhaust, to reduce emissions..