| Function of the secondary air system |
| The secondary air system blows air behind the exhaust valves during a cold start. This enriches the exhaust gas with oxygen, initiates a post-combustion and thus shortens the heating-up phase of the catalytic converter. The actuation of the combination valve and the secondary air pump motor -V101- is performed by the engine control unit -J220- via the secondary air pump relay -J299-. |
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