P0247 moderate

Turbo/Supercharger Wastegate Solenoid B Low

The P0247 code means the vehicle's onboard diagnostic system has detected: Turbo/Supercharger Wastegate Solenoid B Low. This is a moderate severity code.

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Keep driving?
Short distances only
DIY difficulty
hard
Estimated cost
$100 - $500 (parts and labor)
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Common Symptoms

  • Check Engine Light on
  • Overboost condition possible
  • Engine power fluctuations
  • Turbo surge or flutter under boost

Probable Causes (Ranked by Likelihood)

  • Short to ground in wastegate solenoid B wiring Very High
  • Internally shorted wastegate solenoid B High
  • Corroded solenoid connector Moderate
  • PCM driver circuit fault Low

Step-by-Step Diagnostic Procedure

  1. Measure wastegate solenoid B resistance. Below spec indicates internal short.

  2. Check wiring for shorts to ground between solenoid and PCM.

  3. Disconnect solenoid and verify code changes to circuit high.

  4. Inspect turbo wastegate actuator for mechanical binding that may be overloading the solenoid.

Frequently Asked Questions

What is the wastegate solenoid?

The wastegate solenoid controls boost pressure by regulating vacuum or pressure to the turbo wastegate actuator. When the solenoid fails, boost pressure may be uncontrolled.

Can P0247 cause overboosting?

Yes, if the wastegate solenoid is stuck in a position that holds the wastegate closed, boost pressure can exceed safe limits.

Is P0247 specific to twin-turbo engines?

The B designation can indicate a second wastegate solenoid on twin-turbo engines, or a secondary solenoid on single-turbo systems.

Sources

This page is built from documented references. Verify against your own service info before repair work.

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