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Losing boost

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Old 11-25-2023, 11:39 PM
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e63s amg edition 1
Losing boost
Has anyone had issues of only getting about 40% boost the valve on the driver side muffler won’t open up and I believe that’s causing it trying to see if anyone else has had this issue
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Old 11-26-2023, 11:38 AM
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'12 C63 Edition 1 Sedan & '18 E63S PA1
Very common. When the exhaust valve actuator fails, it throws a code to the CPC to cut boost. You'll need to replace the faulty exhaust valve actuator or tune your CPC to deal with the code.
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