DURAMAX-P0048 serious Duramax ›

Turbo/Super Charger Boost Control Solenoid Circuit High

The DURAMAX-P0048 (Duramax) diesel fault code means: Turbo/Super Charger Boost Control Solenoid Circuit High. This is a serious severity code.

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Keep driving?
No — stop driving
DIY difficulty
advanced
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What Are the Symptoms of DURAMAX-P0048?

  • Check Engine Light on
  • Reduced power or a reduced power message
  • Boost lower or higher than normal

What Causes DURAMAX-P0048? (Most Likely First)

  • Open circuit or unplugged connector at the solenoid or actuator High
  • Control wire shorted to voltage Moderate
  • Failed solenoid or actuator Moderate
  • Engine computer driver fault Low

Can I Still Drive with DURAMAX-P0048?

No — stop driving. DURAMAX-P0048 is rated serious severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.

Frequently Asked Questions

What does P0048 mean on a Duramax?

P0048 means Turbo/Super Charger Boost Control Solenoid Circuit High. The voltage on the boost control solenoid circuit is higher than expected, which usually points to an open circuit or a short to voltage.

Is P0048 a Duramax-specific code?

No. P0048 is a generic OBD-II code defined by SAE J2012, so it means the same thing on any vehicle that sets it. The exact conditions GM uses to set it on its diesels are in GM service information.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose DURAMAX-P0048?

  1. Inspect the solenoid or actuator connector and harness near the turbocharger for heat damage.

  2. Check the control circuit for an open and for a short to voltage.

  3. Check solenoid resistance against the service specification.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0048 as a generic OBD-II code)

P0048 on Other Platforms

The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:

Gas / Automotive (OBD-II) Generic OBD-II definition for P0048

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More Duramax codes → Diesel home All diesel codes Heavy-duty Guides

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