Skip to main content
Diagnose/P0033
P0033Medium SeverityEngine

Turbo/Supercharger Bypass Valve Control Circuit

What This Means

The turbocharger or supercharger bypass valve control circuit has a general malfunction. The bypass valve diverts boost pressure to prevent overboost conditions.

Common Symptoms

  • Overboost or underboost
  • Reduced power
  • Turbo surge noise
  • Check engine light on

Common Causes

  • Faulty bypass valve solenoid
  • Wiring issue to valve
  • Vacuum line leak
  • Failed boost control actuator
  • PCM driver fault

Estimated Repair Cost

$150 – $800
Parts and labor (varies by vehicle and location)
Difficulty:Moderate

Need This Fixed?

Find certified mechanics near you who can diagnose and repair P0033.

Find a Shop Near You
Search Another Code

For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.