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Home >> Volvo >> 2012 >> S80 T-6 >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control Module (BCM) - Specifications, Other >> Brake Control Module (BCM) >> Description Of Activations >> Activating All Versions >> Check Valve
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Check Valve

Activating check valve

Pumping sound from brake servo

If the valve is activated when the vehicle starts idling, the engine sputters and RPM drops a bit.

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