Engine Oil Pressure Data Valid But Below Normal
The VOLVO-MACK-MID128-PID100-FMI1 (Volvo/Mack D/MP Series) diesel fault code means: Engine Oil Pressure Data Valid But Below Normal. This is a critical severity code.
- Keep driving?
- No — stop driving
- DIY difficulty
- intermediate
- Estimated cost
- $300-$1,800
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View pilot availability →What Are the Symptoms of VOLVO-MACK-MID128-PID100-FMI1?
- Check Engine Light illuminated
- Possible engine derate
- Fault code active on scan tool
What Causes VOLVO-MACK-MID128-PID100-FMI1? (Most Likely First)
- Failed sensor element Likely
- Harness damage or connector issue Likely
- Actual out-of-spec engine condition Possible
- ECM calibration or software fault Less Likely
Can I Still Drive with VOLVO-MACK-MID128-PID100-FMI1?
No — stop driving. VOLVO-MACK-MID128-PID100-FMI1 is rated critical severity. Continuing to drive in this state risks further damage — get it looked at before your next trip.
Frequently Asked Questions
What does Volvo/Mack code MID128-PID100-FMI1 mean?
Volvo/Mack code MID128-PID100-FMI1 (Engine Oil Pressure Data Valid But Below Normal) is a critical-severity diagnostic trouble code set on D11/MP7, D13/MP8, and D16/MP10 diesel engines in Volvo VNL/VNR and Mack Anthem/Pinnacle/Granite/Titan trucks. It indicates a fault in the engine mechanical system and should be read with Volvo Premium Tech Tool (PTT) or Mack Guided Diagnostics.
Can I drive a Volvo or Mack truck with code MID128-PID100-FMI1?
No — this fault typically triggers derate or forced engine shutdown countdown. Further operation risks engine damage or stranding. Repair before continuing service.
How much does it cost to fix Volvo/Mack code MID128-PID100-FMI1?
Typical repair falls in the range $300-$1,800. Sensor/wiring repairs are at the low end; EGR cooler, NOx sensor set, DEF pump, injector, or head work runs at the high end. Volvo PTT or Mack Guided Diagnostics is normally required for calibration and parameter programming.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose VOLVO-MACK-MID128-PID100-FMI1?
Connect Volvo PTT or Mack Guided Diagnostics and capture freeze-frame for the fault.
Verify live data against expected spec for the sensor/system in question.
Inspect harness and connector for damage or corrosion.
Which Vehicles Commonly Get VOLVO-MACK-MID128-PID100-FMI1?
- Volvo VNL 760/860 with D13
- Volvo VNR 640 with D11/D13
- Mack Anthem with MP8
- Mack Pinnacle with MP7/MP8
- Mack Granite with MP7/MP8
- Mack Titan with MP10
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