Secondary Air Injection Bypass Kit Comparison

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

How Do You Fix the Secondary Air Injection System? The most expensive option is having Toyota or Lexus repair with factory or OEM components. On average, most dealerships quote $2,000 to $3,000 for parts and labor. However, this option may not address all secondary air components or prevent future failure. Save time and money by…

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What Do My SAIS Error Codes Mean?

Check Engine Light on Dashboard

Error codes, or diagnostic trouble codes (DTCs), consist of alphanumeric characters that correspond to specific issues with a vehicle. When a DTC is tripped, the check engine light (CEL) will appear on the dash. Once a CEL appears, it is important to use an OBDII scanner or another scan tool to read the DTCs. If…

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What is the Secondary Air Injection System?

Secondary Air Injection System Illustration

The Secondary Air Injection System (SAIS) is part of a vehicle’s exhaust system. Manufacturers began introducing it in the 1960s to help reduce hydrocarbon and carbon monoxide emissions, both of which resulted from incomplete combustion. Toyota and Lexus SAIS systems are only commanded to operate after a cold start, which is when the engine has…

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