Suspended fuel quantity control
The engine control module has detected an issue with fuel quantity control.
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What it means (plain English)
The engine's computer is having trouble managing how much fuel is being injected, which can lead to performance issues or engine stalling.
What the computer is actually seeing
The Engine Control Module (ECM) sees inconsistent or incorrect signals from the fuel control system when trying to adjust fuel quantity.
What a healthy reading looks like
Fuel rail pressure around 3000-5000 PSI during operation, injector pulse width should be between 2-5 milliseconds for average conditions.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check fuel levels in the tank; ensure sufficient fuel is available.
- 22. Inspect wiring and connectors related to the fuel injectors and pressure regulator for damage or corrosion. Fix if needed.
- 33. Using a scan tool, monitor fuel rail pressure. It should be between 3000-5000 PSI while running. If not, investigate the pressure regulator or pump.
- 44. Check for injector pulse width; should be between 2-5 milliseconds in normal operating conditions. Adjust or replace injectors based on readings and test results.
- 55. If all checks are clear and issue persists, replace the engine control module (ECM) as a last resort.
Common causes
- Faulty fuel injectors
- Wiring issues or loose connections in fuel control circuit
- Defective fuel pressure regulator
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive until the issue is fixed, as it can lead to stalling or loss of power.
Will this code come back if I clear it?
Yes, if the underlying issue isn't resolved, the code will likely reappear.
Why might this code appear with other codes?
This often pairs with fuel system codes if multiple components are failing or if there's a common wiring issue affecting the entire system.
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