Cylinder 8 Contribution/Balance
The DURAMAX-P0284 (Duramax) diesel fault code means: Cylinder 8 Contribution/Balance. This is a serious severity code.
- Keep driving?
- Yes, with caution
- DIY difficulty
- intermediate
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What Are the Symptoms of DURAMAX-P0284?
- Check Engine Light on
- Rough idle
- Knocking or uneven running
- Possible smoke from the exhaust
What Causes DURAMAX-P0284? (Most Likely First)
- Cylinder 8 injector delivering the wrong amount of fuel High
- Injector wiring or connector fault Moderate
- Low compression on cylinder 8 Moderate
Can I Still Drive with DURAMAX-P0284?
Yes, with caution. DURAMAX-P0284 is rated serious severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What does P0284 mean on a Duramax?
P0284 means Cylinder 8 Contribution/Balance. The engine computer has found that cylinder 8 is contributing more or less power than the other cylinders.
Is P0284 a Duramax-specific code?
No. P0284 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-P0284?
Check injector balance or contribution data on a scan tool.
Inspect the cylinder 8 injector harness and connector.
Run a compression or relative compression test before replacing the injector.
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines P0284 as a generic OBD-II code)
P0284 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown:
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