Turbocharger/Supercharger Bypass Valve A Position Exceeded Learning Limit

Where it lives

For P2BBE, start at the valve the description names.

Check these first

• Carbon buildup making the bypass valve stick through its travel
• A worn bypass valve actuator gear or linkage
• A binding valve shaft or linkage arm
• A faulty valve position sensor inside the actuator

What to do next

1. Inspect the bypass valve for carbon and soot around the plate
2. Check the linkage for binding and free travel by hand
3. Command the valve open and closed with a scan tool and watch the position
4. Clean the valve and linkage of carbon deposits
5. Replace the bypass valve assembly if it will not reach its learned limits
6. Clear the code and run the valve relearn

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