What is P0491 : Engine Error Code Causes Explained
1:48
YouTubeAuto User Guide
What is P0491 : Engine Error Code Causes Explained
In this video, we’ll explain Engine Error Code P0491, which refers to a malfunction in the Secondary Air Injection System on Bank 1. This system helps reduce emissions by injecting fresh air into the exhaust stream during a cold start. If it fails, it can trigger your check engine light and cause your vehicle to run less efficiently. 🌍🚗 ...
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