Turbocharger/Supercharger Bypass Valve B Control Circuit Low

Where it lives

For P00C1, the description names the valve as the part involved.

Check these first

• A short to ground on the bypass valve B control wire
• A valve B solenoid with low resistance
• Low system voltage to the valve B circuit
• Corroded pins in the valve B connector
• A faulty ECM driver holding the circuit low

What to do next

1. Check battery voltage and charge if it is low
2. Inspect the valve B connector and wiring for corrosion
3. Test the valve B control wire for a short to ground
4. Measure the valve B solenoid resistance against spec
5. Replace the bypass valve B if the solenoid is shorted
6. Clear the code and retest

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