| Secondary air system: engine code AJH |
| During a cold start, air is blown in behind the exhaust valve by the secondary air system. This produces an oxygen-rich exhaust gas, causing afterburning and reducing the heat-up phase of the catalytic converter. The Motronic control unit -J220- activates the secondary air inlet valve -N112- and combination valve via the secondary air pump relay -J299-. |
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