Cummins Generator Error Code 316: How to Fix It

Medium 1-2 hours Medium Severity Verified June 2026
Error Code
316
Brand
Cummins
Product Type
generator
Severity
Medium
DIY Difficulty
Medium
Estimated Fix Time
1-2 hours
Error code 316 on a Cummins generator means the engine control module (ECM) has detected a problem with the fuel injector on cylinder #6. This could be due to electrical issues, clogging, or mechanical failure. Follow these steps to diagnose and resolve the issue.
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Tools You'll Need

How to Fix Error Code 316

  1. Safety First

    Always disconnect battery before working on fuel system to prevent accidental start. Fuel is flammable; no smoking or open flames.
  2. Retrieve Diagnostic Codes

  3. Inspect Wiring and Connectors

  4. Test Injector Resistance

    Injector may be under high pressure; do not remove injector while engine is warm.
  5. Check Fuel Supply

    Fuel under pressure may spray; relieve pressure before loosening lines.
  6. Replace Cylinder #6 Injector

    Ensure engine is cool and battery disconnected. Use proper torque for injector hold-down bolts.
  7. Clear Codes and Test Run

Parts You May Need

Fuel injector for cylinder #6
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Injector wiring harness (if damaged)
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Fuel injector for cylinder #6
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Injector wiring harness (if damaged)
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Fuel injector for cylinder #6
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Injector wiring harness (if damaged)
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Fuel injector for cylinder #6
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Injector wiring harness (if damaged)
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When to Call a Professional

If you are not comfortable working with high-pressure fuel systems or if the code returns after replacing the injector, call a certified Cummins technician. Professional help is also needed for ECM reprogramming or injector calibration.

Frequently Asked Questions

Can I drive my RV with a Cummins generator error code 316?
No, we do not recommend operating the generator with code 316. The injector issue can cause poor performance, excessive fuel consumption, or engine damage. Fix the issue before use.
What causes injector failure on a Cummins generator?
Common causes include contaminated fuel, clogged injector, worn internal parts, electrical faults (wiring/connector issues), or a faulty ECM. Regular maintenance helps prevent failures.
Can I replace just one injector or should I replace all?
You can replace just cylinder #6 injector, but it's often recommended to replace all injectors if they have high mileage or age to ensure balanced performance. Check your manual for guidance.
How much does it cost to fix error code 316?
The cost varies by model and labor. A single injector part may cost $100-$300, plus labor if done by a professional ($200-$500). DIY can save on labor.
Will error code 316 clear itself after repairs?
The code may remain stored until cleared with a diagnostic tool. After fixing the issue, use the tool to clear the code. If the problem is resolved, the code will not reappear.