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Good evening, on the C5 the fault P11AB - air circuit - boost pressure below minimum limit persists. The car works fine at idle. As soon as engine temperature is up under acceleration it goes flat out (as if running on 3 cylinders) and smokes black.
Checked and replaced MAF and MAP sensor. (EGR valve and DPF removed from PCM years ago).
checked the parameters and found no obvious anomalies.
A little help, please
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