Posts Tagged: Secondary air injection system incorrect flow detected

Understanding the P0411 Secondary Air Code: Causes and Fixes

Troubleshooting the P0411 Secondary Air Code in Your Vehicle The P0411 code (DTC) is a common issue in vehicles equipped with secondary air injection systems. This code is triggered when the Powertrain Control Module (PCM) detects an issue with the Secondary Air Injection System (SAIS), specifically when the system’s airflow is insufficient or not detected during the activation phase. In simpler terms, the P0411 Secondary Air Code indicates a problem with the system that pumps fresh air into the exhaust to help reduce emissions. Understanding the causes and potential fixes … Read More