P0248 moderate

Turbo/Supercharger Wastegate Solenoid B High

The P0248 code means the vehicle's onboard diagnostic system has detected: Turbo/Supercharger Wastegate Solenoid B High. 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 illuminated
  • Low or no turbo boost
  • Significant power loss
  • Turbo may not spool up at all

Probable Causes (Ranked by Likelihood)

  • Open circuit in wastegate solenoid B wiring Very High
  • Burned-out wastegate solenoid B High
  • Disconnected solenoid connector Moderate
  • PCM driver open Low

Step-by-Step Diagnostic Procedure

  1. Measure wastegate solenoid B resistance. Infinite ohms confirms open coil.

  2. Check connector is seated and pins are intact.

  3. Test wiring continuity from PCM to solenoid.

  4. If wiring is good, replace the wastegate solenoid.

Frequently Asked Questions

Why do I have no boost with P0248?

When the wastegate solenoid circuit is open, the wastegate may default to the open position, allowing exhaust to bypass the turbo and preventing boost buildup.

Can a wastegate solenoid burn out?

Yes, the solenoid coil can fail open from heat exposure, age, or excessive current. These solenoids are exposed to high under-hood temperatures.

How do I test the wastegate solenoid?

Disconnect it and measure resistance with a multimeter. Also apply 12V directly to see if it clicks and holds vacuum when connected to a vacuum pump.

Sources

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

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