P226300 cruising above 130kmph
#1
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2020 GLE 450 W167
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Hey there i'm struggling with this issue on my 2009 C250 CDI. CEL comes on and the car goes into limp mode. Hooked it up to a Star tester and i'm getting P226300 - boost pressure deviates from the specific vacuum.
This only happens when driving above 130 kmph, at a constant speed. The rest of the time the car seems almost normal. Lacks a bit of power, i especially notice this when i accelerate hard from a standstill. The car is a manual and normally it would spin the wheels like crazy when launching at 3k revs. Now it almost nose dives. The rest of the time it feels like 90% of the power is available.
My mechanic decided to replace the intercooler - turbo hose. Nothing changed. Then he replaced the intake manifold. Still the same problem.
Any ideeas? This is getting pretty expensive...
This only happens when driving above 130 kmph, at a constant speed. The rest of the time the car seems almost normal. Lacks a bit of power, i especially notice this when i accelerate hard from a standstill. The car is a manual and normally it would spin the wheels like crazy when launching at 3k revs. Now it almost nose dives. The rest of the time it feels like 90% of the power is available.
My mechanic decided to replace the intercooler - turbo hose. Nothing changed. Then he replaced the intake manifold. Still the same problem.
Any ideeas? This is getting pretty expensive...
#2
With more complicated problems, I always recommend visiting a dealer because they check and take responsibility for solving the problem after you replace something. Indie mechanics can make you replace 2-3 things before solving the problem. It is more painful and sometimes more expensive to visit indie mechanics