What is SPN 1383 FMI 11
To properly fix this fault, it’s important to understand what the code actually means.
- SPN 1383 tells you the issue is related to engine oil pressure.
- FMI 11 means the pressure reading is critically below normal, even though the sensor is working and reporting accurate data.
Together, SPN 1383 FMI 11 means your engine is running with oil pressure that’s dangerously low. It’s not a false alarm — the engine is at real risk of damage if you keep it running.
Why This Happens
This issue usually points to a problem in the oil flow or pressure system. Common causes include:
- The engine is running low on oil.
- The oil pump isn’t working correctly.
- The oil filter is clogged or collapsed.
- Oil passages are blocked due to sludge or dirty oil.
- The engine has worn bearings that are reducing pressure.
- There’s an external leak from seals or gaskets.
- In rare cases, the pressure sensor may be inaccurate but not completely failed.
How to Fix It
This code signals a serious problem — here’s how to troubleshoot it step by step:
- Shut off the engine immediately to prevent internal damage.
- Check the oil level and refill it if needed.
- Inspect for leaks around the oil pan, gaskets, and seals.
- Replace the oil filter if it’s old or clogged.
- Use a manual pressure gauge to confirm actual oil pressure.
- If pressure is low, the oil pump may need repair or replacement.
- If pressure is normal, but the code remains, replace the pressure sensor.
- Clear the fault code and restart the engine to confirm the fix.
How to Avoid It Before It Happens
Avoiding low oil pressure faults starts with consistent maintenance and early detection. Here’s what you can do:
- Check oil levels daily before starting the machine.
- Use quality oil and follow the recommended service intervals.
- Replace oil filters regularly to prevent blockages.
- Train operators to report small issues before they become big ones.
- Use a construction equipment management tool like Clue to receive instant alerts when oil pressure drops, helping you act early and keep machines running efficiently.
