alexanderhartmann1
AMG GT Hybrid Check Engine Light Resolved
Summary of the thread
A 2020 Mercedes AMG GT hybrid experienced a check engine light, reduced power, laggy engine response, and increased fuel consumption. The suspected cause was a boost pressure control fault, possibly due to a vacuum leak. The issue was identified as a defective vacuum switching valve, which was replaced, resolving the problem and restoring the car's performance.
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4 comment(s)
alexanderhartmann1 (community.author)
Thanks. Where exactly is that valve located? Is it easy to get to? I'm hoping it's not buried deep in the intake manifold.
GerryMue
It's usually near the intake manifold, but honestly, it can be a pain to get to depending on the engine layout. If you're not comfortable poking around, I'd recommend taking it to a workshop. Could save you a lot of hassle. A defective valve could be the issue, and it's not too expensive to replace.
alexanderhartmann1 (community.author)
Thanks for the advice. Turns out it was the vacuum switching valve, just like you said. Cost me 140€ to get it replaced. Runs like new again.
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AMGGT
GerryMue
Sounds familiar. I had similar symptoms on my AMG GT. Check the boost controller and the vacuum switching valve. A pressure drop could be caused by a faulty boost solenoid. The vacuum switching valve regulates vacuum to different components. If the valve is defective, it can cause all sorts of issues.