Fuel Flow Rate Measurement Error
The system detects an abnormal fuel flow rate.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The engine's computer expects a certain amount of fuel to be flowing, but it's reading an unexpected amount, which could mean a problem with the fuel system.
What the computer is actually seeing
The ECM is monitoring the fuel flow rate from various sensors. When it detects a flow rate outside normal parameters, it sets this fault code.
What a healthy reading looks like
Normal fuel flow should be within manufacturer specs, typically around 50-200 mm3/stroke depending on engine design; voltage signals from the fuel flow sensor should be 0.5 to 4.5 volts.
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 the fuel level in the tank and ensure it's above the minimum required level for operation. Decision: If low, refill and retest. If adequate, proceed to step 2.
- 22. Inspect the wiring and connector for the fuel flow sensor. Look for signs of corrosion, loose connections, or damage. Decision: If damaged, repair/replace as needed and retest. If intact, proceed to step 3.
- 33. Test the fuel flow sensor by measuring output while the engine is running. You should see a voltage change relative to fuel flow. Decision: If out of spec, replace the sensor. If within spec, proceed to step 4.
- 44. Check for any blockages in the fuel lines or filters. Replace the fuel filter if it's dirty or clogged. Decision: If blockage found and repaired, retest. If clear, proceed to step 5.
- 55. Use a scan tool to check for additional codes that may indicate a broader problem with the fuel system. Decision: If related codes are found, address those as well.
Common causes
- Clogged fuel filters
- Faulty fuel flow sensor
- Air in the fuel system
- Leaking fuel lines or connections
- ECM software issue
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity means you can drive but should address it soon. Monitor for performance issues.
Will this code come back after clearing?
If the underlying issue isn't fixed, yes, the code will likely return.
Why does this code pair with SPN 2211?
SPN 2211 also relates to fuel flow but may indicate specific issues with the fuel metering system, so they often appear together.
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