Mark Robins
Tested AMM response by opening EGR with actuator test and the engine respond quite dramatically, and as you can see from the waveform there is a noticeable drop in air flow, so I would guess that the ports are clear. 
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Vauxhall Zafira Z19DTH 2006 - Air leak, code P2279 # - Mark Robins April 27, 2015, 11:19 am
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on April 27, 2015, 2:17 pm, in reply to "