P2B56: B Camshaft Profile Actuator B Control Stuck On Bank 2
Single source — subject not independently confirmed
Most codes here are written only once two independent sources agree on what they mean. This one rests on a single source, checked against the codes around it — its family, its block and its neighbours all fit. That makes the subject below likely rather than established, so we have deliberately left out the severity rating, the repair advice and the likely-causes list that a confirmed code carries.
If you have met this code on a real car, what you know is worth more than what we have — please post it below.
What this code means
This code concerns the second camshaft profile actuator — variable valve lift, which switches between cam lobes of different shape and is a different device from the phaser that varies timing. It is reported stuck on, so it did not stop when commanded. The corpus documents the closest confirmed member of this family at P0010.
Components involved
Information, not instruction
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Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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