DURAMAX-P0489 moderate Duramax ›

Exhaust Gas Recirculation Control Circuit Low

The DURAMAX-P0489 (Duramax) diesel fault code means: Exhaust Gas Recirculation Control Circuit Low. This is a moderate severity code.

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Keep driving?
Yes, with caution
DIY difficulty
intermediate
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What Are the Symptoms of DURAMAX-P0489?

  • Check Engine Light on
  • Possible rough idle or reduced power

What Causes DURAMAX-P0489? (Most Likely First)

  • Control wire shorted to ground High
  • Shorted EGR valve actuator High
  • Corroded connector Moderate
  • Engine computer driver fault Low

Can I Still Drive with DURAMAX-P0489?

Yes, with caution. DURAMAX-P0489 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.

Frequently Asked Questions

What does P0489 mean on a Duramax?

P0489 means Exhaust Gas Recirculation Control Circuit Low. The voltage on the EGR control circuit is lower than expected, which usually points to a short to ground or a shorted actuator.

Is P0489 a Duramax-specific code?

No. P0489 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-P0489?

  1. Inspect the EGR valve connector and harness for heat damage.

  2. Check the actuator resistance against the service specification.

  3. Check the control circuit for a short to ground.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0489 as a generic OBD-II code)

P0489 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 P0489

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

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