Posts Tagged: secondary air injection system
P0410 Code: Causes, Symptoms, and Fixes
Why Your Car Has a P0410 Code and How to Fix It Quick Summary The P0410 code indicates a problem in the secondary air injection system, which is designed to reduce emissions during cold starts. In my experience diagnosing this code, the most common causes are a failed air pump, clogged passages, or a bad check valve. The fix depends on proper diagnosis—blindly replacing parts is a mistake I see all the time. For more information on how the Secondary Air Injection System Works and the Components Involved, see this … Read More
Why carmakers install a secondary air injection system
What is a secondary air injection system A secondary air injection system is part of a vehicle’s emission system. It’s used to reduce emissions during cold starts when the engine is running on a rich fuel mixture to overcome the cold quenching effect of cold combustion cylinders. Unfortunately, the rich fuel mixture doesn’t burn completely causing some of the unburned fuel to exit with the exhaust and flow into the catalytic converter. The catalytic converter is responsible for burning off the excess fuel, but first it must reach a “light … Read More