Secondary Air Bypass Kit Comparison

Hewitt Technologies Secondary Air Bypass Kit Comparison Gen 1 vs Gen 2

Hewitt Tech Bypass Kits come in two Generations, Gen 1 and Gen 2. When deciding which kit is best for you please note that our solutions are both vehicle specific and error code specific. That said, compatibility depends on the Year/Model/Engine Size of your vehicle. Additionally, the error codes that are present will play a…

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What Do My SAIS Error Codes Mean?

Check Engine Light on Dashboard

Error codes or Diagnostic Trouble Codes (DTC) consist of alpha and numeric characters that correspond to specific issues with the vehicle. Any time a DTC is tripped you will see the Check Engine Light (CEL) on your dash. Once you see a CEL it is important to use a scan tool to read your DTCs.…

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What is the Secondary Air Injection System?

Secondary Air Injection System Illustration

The Secondary Air Injection System (SAIS) is a part of the vehicles exhaust system. Manufacturers began introducing them in the 1960’s to help reduce hydrocarbon and carbon monoxide emissions, both of which are result of incomplete combustion. On Toyota and Lexus vehicles that have SAIS it is only commanded to operate after a cold start,…

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