Decoding P0411 The Ultimate Guide to Troubleshooting

P0411 Code: Secondary Air Injection Incorrect (OBD-II). Jump to Latest. 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. Due to the possibility of the faucet being a "customized build" product, the user is responsible to first compare the existing cartridge needing replacement ... The car will run approximately 20 to 30 minutes and will start to shake and shut off. We replaced the throttle body due to launch scanner stating it was ... Cooper Bearing P0411: Amazon.com: Industrial & Scientific. 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 ... The p0411 means that the air pump used to inject air into your exhaust ahead of your catalytic converters is not working properly. I bought a new smog pump and a new check valve. i swapped out both parts valve and pump. Only code i get now is P0411. when starting the car now the pump is ... 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. Troubleshoot your vehicle's P0411 code for Secondary Air Injection System Incorrect Flow Detected with our expert advice and solutions.