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P0411

If you didn't already erase the code, try that and see if the code comes back. If it does, the remaining causes of code P0411 (https://www.yourmechanic.com/article/p0411-obd-ii-trouble-code-secondary-air-injection-system-incorrect-flow-detected-by-spencer-clayton) include air lines that are faulty, the air injection system has excessive carbon buildup...

A code P0411 (https://www.yourmechanic.com/article/p0411-obd-ii-trouble-code-secondary-air-injection-system-incorrect-flow-detected-by-spencer-clayton) indicates a secondary air injection system (https://www.yourmechanic.com/services/exhaust-system-inspection) incorrect flow has been detected. This is essentially a system of flushing clean and fresh air into the exhaust system in order to keep the catalytic converter working at...

Hi There, As you may know, the purpose of the secondary air injection system is to inject more air into the exhaust system at cold start to help light the catalyst material inside the catalytic converter quicker. The reason for...