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Update: The WBo2 problem was caused by the sensor body being overheated. All air that reach the outside of the sensor has passed between the head and the wastegate or between the strut tower and the wastegate. This is not very related to exhaust temperature as it would not happen at high speed testing, but it would happen when we let off and cruised afterwards. The sensor recovers when it has cooled down. -Jörgen |