OBD-II Error Code P0035: Turbocharger Bypass Valve Control High - How to Fix It

Medium 30-60 minutes Medium Severity Verified June 2026
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Error Code
P0035
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
30-60 minutes
Error code P0035 means your car's engine control module has detected that the turbocharger bypass valve (also called wastegate) control circuit voltage is higher than normal. This can reduce performance and fuel economy, and may trigger the check engine light.
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Tools You'll Need

How to Fix Error Code P0035

  1. Inspect Wiring and Connector

    Ensure the engine is off and cool before working near the turbocharger.

  2. Test the Bypass Valve

  3. Check Voltage Supply and Ground

    Use caution to avoid short circuits; do not probe wires with the engine running.

  4. Clear Codes and Test Drive

    If the check engine light comes back immediately, professional scan tool data may be required.

Parts You May Need

Turbocharger bypass valve (solenoid)
Check Price on Amazon
Turbocharger bypass valve (solenoid)
Check Price on Amazon
Turbocharger bypass valve (solenoid)
Check Price on Amazon
Turbocharger bypass valve (solenoid)
Check Price on Amazon
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When to Call a Professional

If you've checked wiring, connector, valve resistance, and voltage supply but the code returns, the issue may be a faulty engine control module (ECM) or complex turbo actuator problem. A professional mechanic can perform advanced diagnostics with a factory-grade scan tool.

Frequently Asked Questions

Can I drive with error code P0035?
You can usually drive short distances, but reduced performance and potential turbo damage may occur. It's best to diagnose and fix promptly to avoid further issues.
What are common symptoms of P0035?
Common symptoms include check engine light, reduced engine power, poor acceleration, and occasionally a whistling noise from the turbo area.
How much does it cost to fix P0035?
DIY cost is typically $50-$150 for a new bypass valve and minor supplies. Professional repair can range from $200-$500 depending on labor and parts.
Is code P0035 the same as P0034?
No. P0034 indicates a low control circuit, while P0035 indicates a high control circuit. Both relate to the turbo bypass valve but have different causes.
Will a bad turbo bypass valve cause a boost leak?
Yes, if the valve is stuck open or not sealing properly, it can cause a boost leak, leading to poor performance and potential overboost conditions.

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