Turbocharger/Supercharger Bypass Valve B - Mechanical

Where it lives

For P00C4, the description names the valve as the part involved.

Check these first

• A bypass valve B stuck open or closed
• Carbon buildup on the valve or seat
• A worn valve stem or seal
• A clogged intake restricting the valve
• A kinked or misrouted vacuum line to the valve

What to do next

1. Inspect the bypass valve B for sticking by hand
2. Check the intake for a blockage and clean if needed
3. Look for carbon on the valve and seat and clean it
4. Inspect the valve stem and seal for wear
5. Replace the bypass valve B if it stays stuck
6. Clear the code and retest

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