P226300 cruising above 130kmph
Thread Starter
Junior Member
Joined: Nov 2013
Posts: 30
Likes: 0
From: Bucharest, Romania
2020 GLE 450 W167
P226300 cruising above 130kmph
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...
Senior Member
Joined: Feb 2011
Posts: 465
Likes: 16
C204
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
