Tackle P0411 with Confidence The Ultimate Guide

Most of the time with this code it is the check valve on the head that freezes up and won't open. Thus, when the pump runs, no flow is detected ... The 4 way control line splitter AND 3 way splitter are cracking/splitting. You need to apply 15PSI to pressure test all the intake system. Possible Causes · Fuel Pump Relay (J17) faulty · Hoses/Pipes to/between Components faulty/clogged · Secondary Air Injection Pump (V101) faulty · Secondary Air ... The Secondary AIR system will set code P0411 when both the AIR pump and AIR solenoid are commanded ON but the system pressure falls outside the expected 0.7-1. ... Pillow Block Housing - Four-Bolt Base. 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 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. Anyway I think I found the problem, the check valve from the TAD valve to the crossover tube is just hanging there not connected. Started bronco ... A common issue with GM, VW and Audi vehicles are air injection flow codes like p0410, p0411, and p0412. How to fix P0411 Code: Secondary Air Injection Incorrect Flow Detected The secondary air system supplies fresh air to the exhaust which ...