MAXXFORCE-P0563 moderate MaxxForce ›

System Voltage High

The MAXXFORCE-P0563 (MaxxForce) diesel fault code means: System Voltage High. This is a moderate severity code.

My Garage →
Keep driving?
Yes, but fix soon
DIY difficulty
intermediate
Estimated cost
$300-$900
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What Are the Symptoms of MAXXFORCE-P0563?

  • CEL
  • Battery warning

What Causes MAXXFORCE-P0563? (Most Likely First)

  • Overcharging alternator Likely
  • Bad voltage regulator Possible

Can I Still Drive with MAXXFORCE-P0563?

Yes, but fix soon. MAXXFORCE-P0563 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.

Frequently Asked Questions

What is P0563 on a MaxxForce DT (7.6L)?

P0563 on a MaxxForce DT (7.6L) (2007-2015) indicates: System Voltage High. This is a known fault code on the MaxxForce engine family and typically points to the causes listed above.

Can I drive with P0563 on my MaxxForce?

Yes, you can generally drive with this code, but diagnose soon to prevent secondary damage.

How much does it cost to fix MaxxForce P0563?

Repair cost is typically $300-$900 depending on the underlying cause and shop rate. Many MaxxForce faults (especially EGR cooler, head bolt, and VGT repairs) are major expenses that drove fleet owners to repower with Cummins or retire these trucks early.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose MAXXFORCE-P0563?

  1. Test alternator output -- should be 13.5-14.8V.

  2. Replace alternator.

Sources 1

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

  • SAE J2012Diagnostic Trouble Code Definitions (defines P0563 as a generic OBD-II code)

P0563 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 P0563 Duramax moderate System Voltage High Hino moderate System Voltage High Isuzu moderate System Voltage High PACCAR moderate System Voltage High Power Stroke moderate System Voltage High

Which Vehicles Commonly Get MAXXFORCE-P0563?

  • International 4300 DuraStar MaxxForce DT
  • International 4400 DuraStar MaxxForce DT
  • International 7300/7400/7500 WorkStar MaxxForce DT
  • IC Bus CE-Series MaxxForce DT
  • IC Bus RE-Series MaxxForce DT

Explore More

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

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