C5 HPI Antipollution Fault
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It went in with the anti-pollution massage showing , the dealer diagnosed an upstream lambda sensor probe fault and the fuel pressure regulator being faullty. These were both changed but the fault reoccurred whilst they were testing it. This time the diagnosis was a faulty fuel pump that had in fact caused the damage to the other componants.This was changed and all was well ! Not sure if this helps but your diagnosis sounds pretty similar to mine.
Messages 1 to 3 of 3.
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