Turbocharger/Supercharger Bypass Valve B Control Circuit Range/Performance

Where it lives

For P00C3, the part to look at first is the valve named here.

Check these first

• A sticking or slow bypass valve B
• A boost leak in the charge piping
• A faulty boost pressure sensor
• Corroded wiring in the valve B circuit
• A faulty ECM command

What to do next

1. Command bypass valve B with a scan tool and watch travel
2. Compare commanded and measured boost pressure
3. Inspect the valve B linkage for sticking
4. Smoke test the charge piping for a boost leak
5. Replace the bypass valve B if it does not follow the command
6. Clear the code and retest

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