Quote:
Originally Posted by jchapura
Is it possible that because ABS was not activated during the inadvertent pressure draining, that the ABS portion of the circuit did not drain?
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The ABS/PSM control system and pump are one of the highest locations in the braking network, and where air collects when the system is allowed to gravity drain. Fixing the issue is simple, the control system needs to be activated during a subsequent bleed, but that requires a Porsche specific tool to activate it.