Dethroning P0411 The Ultimate Troubleshooting Guide

P0411 Secondary Air Injection System Incorrect Flow Detected. What does that mean? Secondary Air Injection is an emission control that uses an air pump. It came up as P0411 Secondary Air Injection System Incorrect Flow Detected. Any ideas what this could be? The car seems to be fine with no funny noises. I inspected all the vacuum lines from the secondary air pump up to combi valve in back of head. everything was ok; no cracks or kinks. It used to be this code was set if if I had two consecutive cold starts in 20 degree Fahrenheit or below weather. No big deal. P0411-secondary air flow incorrect. System design: Service info pressure specifications are in kpa. The secondary air system consists of the air ... GMC/Chevrolet Truck/SUV - 2015 GMC Terrain 2.4 code P0411 - I have a 2015 GMC Terrain with the 2.4L Ecotec motor Cali emissions. We show you info about the secondary air system and components on VW 2.5L 5 Cylinder engines. A common issue with GM, VW and Audi vehicles are air injection flow codes like p0410, p0411, and p0412. It could be that some water is condensed during the 90 sec. normal operation of the valve. Not sure on that. Maybe the revised valve is meant to ... Brian Hannigan I don't see anything called a fuel injection pump on any diagrams in my manual is that exactly what it's called or is it a fuel ...