Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Air Injection Reactor System: Description
The air injection system reduces Hydrocarbons (HC), Carbon Monoxide (CO) and Nitrous Oxide (NOx) emissions by injecting air into the exhaust system.
A belt driven air pump injects air into the exhaust port of the cylinder head, exhaust manifold or the catalytic converter. The air injection system operates at all times and will by-pass air only for a short time during rich operation, deceleration, or at high speeds.
The air management valve performs by-pass and diverter functions. The check valve protects the air pump from damage by preventing a backflow of exhaust gases.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.