What is the role of the Secondary Air Injection system in reducing emissions during cold starts?

The Secondary Air Injection system reduces emissions during cold starts. It includes an AIR pump, shut-off valve, and pressure sensor. Filtered air goes from the engine's air filter housing to the pump, then to the shut-off/pressure-sensor assembly on the exhaust manifold. A scan tool is recommended for a thorough inspection. The AIR solenoid/shut-off/pressure sensor should be replaced as a complete assembly.

Genuine Chevrolet Cobalt Secondary Air Injection Pump

Secondary Smog Air Injection Pump

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3 Secondary Air Injection Pumps found

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Chevrolet Cobalt Pump Assembly, Secondary Air Injection (W/ Bracket)
Part Number: 12630667
- Other Name: Pump, Air Injection Reactor Pump And Multi, Function Air Compressor; Air Injection Reactor Pump, Injector Pump, Pump
$143.62 MSRP: $298.22
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Fits the following Vehicles:
2010 Chevrolet Cobalt | 2 DOOR, 4 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 4 DOOR, LEVEL ONE (LS) 2 DOOR, LEVEL ONE (LS) 4 DOOR, LEVEL TWO (LT) 2 DOOR, LEVEL TWO (LT) 4 DOOR | 4 Cyl 2.2L
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Chevrolet Cobalt Pump Assembly, Secondary Air Injection (W/ Bracket)
Part Number: 12620313
- Other Name: Pump, Air Injection Reactor Pump And Multi, Function Air Compressor; Air Injection Reactor Pump, Injector Pump, Pump
$155.80 MSRP: $323.52
You Save: $167.72 (52%)

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2009 Chevrolet Cobalt | 2 DOOR, 4 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 4 DOOR, LEVEL ONE (LS) 2 DOOR, LEVEL ONE (LS) 4 DOOR, LEVEL TWO (LT) 2 DOOR, LEVEL TWO (LT) 4 DOOR | 4 Cyl 2.2L
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Chevrolet Cobalt Pump Assembly, Secondary Air Injection (W/ Bracket)
Part Number: 12600828
- Other Name: Pump, Air Injection Reactor Pump And Multi, Function Air Compressor; Air Injection Reactor Pump, Injector Pump, Pump
- Replaces: 12575899
$132.27 MSRP: $314.89
You Save: $182.62 (58%)

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Fits the following Vehicles:
2006-2008 Chevrolet Cobalt | 2 DOOR, 4 DOOR, LEVEL 4 PERFORMANCE/SC (SS) 2 DOOR, LEVEL ONE (LS) 2 DOOR, LEVEL ONE (LS) 4 DOOR, LEVEL THREE (SS) 2 DOOR, LEVEL THREE (SS) 4 DOOR, LEVEL TWO (LT) 2 DOOR, LEVEL TWO (LT) 4 DOOR | 4 Cyl 2.2L
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Chevrolet Cobalt Secondary Air Injection Pump Parts Questions & Answers

Pump Assembly, Secondary Air Injection (W/ Bracket)
12620313
Q: What is the role of the Secondary Air Injection system in reducing emissions during cold starts?
A: The Secondary Air Injection system reduces emissions during cold starts. It includes an AIR pump, shut-off valve, and pressure sensor. Filtered air goes from the engine's air filter housing to the pump, then to the shut-off/pressure-sensor assembly on the exhaust manifold. A scan tool is recommended for a thorough inspection. The AIR solenoid/shut-off/pressure sensor should be replaced as a complete assembly.