Turbocharger/Supercharger Bypass Valve Control Range/Performance Problem
The system detected a performance issue with the turbocharger bypass valve.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
Inside the engine computer, the turbocharger bypass valve is supposed to open and close at specific times to manage boost pressure. If it doesn’t respond within the expected range, the computer sets this code.
What the computer is actually seeing
The engine control unit (ECU) monitors the turbocharger bypass valve position via a circuit. If the valve position doesn’t match what the ECU commands, such as not moving when it should or moving too slowly, the code triggers.
What a healthy reading looks like
The valve should open fully within 200 milliseconds when commanded. Voltage should range from 0.5V (close) to 4.5V (open).
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors to the turbocharger bypass valve for damage or corrosion. Clean or repair as necessary. Decision: If wiring is good, proceed to Step 2.
- 22. Check the voltage at the turbocharger bypass valve connector with the key on, engine off. You should see about 0.5V to 4.5V. Decision: If no voltage, check the circuit back to the ECU. If voltage is good, proceed to Step 3.
- 33. With the engine running, command the turbocharger bypass valve open and closed using a scan tool. Watch for response times. Decision: If the valve does not respond appropriately within 200 ms, it may need replacement.
Common causes
- Faulty turbocharger bypass valve
- Wiring issues or poor connections in the valve circuit
- Faulty engine control unit (ECU)
- Vacuum leaks affecting valve operation
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Yes, but performance may suffer and fuel economy can drop. Fix soon.
Will this code come back after clearing it?
If the underlying issue isn’t resolved, the code will likely return.
Why does this code show up with other turbocharger codes?
These codes can be related due to common components or failures affecting turbo performance.
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