DD-100-3 moderate Detroit Diesel DD Series ›

Engine Oil Pressure Sensor Signal High

The DD-100-3 (Detroit Diesel DD Series) diesel fault code means: Engine Oil Pressure Sensor Signal High. This is a moderate severity code.

This is a standard J1939 fault, not a proprietary code. DD-100-3 is how this equipment displays SPN 100 with FMI 3 (voltage above normal or shorted high) under the SAE J1939 standard used across heavy equipment. The same SPN can appear on any J1939-compliant machine regardless of brand — so cross-referencing it against your engine maker's documentation is valid even when the equipment brand differs.

My Garage →
Keep driving?
Yes, but fix soon
DIY difficulty
intermediate
Estimated cost
$500-$2,200
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What Are the Symptoms of DD-100-3?

  • Check Engine Light / Amber Warning Lamp illuminated
  • Incorrect pressure reading

What Causes DD-100-3? (Most Likely First)

  • Open signal wire Likely
  • Failed sensor Likely

Can I Still Drive with DD-100-3?

Yes, but fix soon. DD-100-3 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.

Frequently Asked Questions

What is Detroit Diesel fault code DD-100-3?

Detroit Diesel fault DD-100-3 (SPN 100 FMI 3) indicates: Engine Oil Pressure Sensor Signal High. It is a moderate-severity fault and is commonly seen on DD13/DD15/DD16 engines in Freightliner and Western Star chassis.

Can I drive my Freightliner or Western Star with fault DD-100-3?

It depends on severity. Critical and serious faults trigger derate or engine shutdown — do not continue driving. Moderate faults usually allow continued operation short-term but schedule repair to prevent cascading aftertreatment damage.

How much does it cost to fix Detroit Diesel fault DD-100-3?

Estimated repair cost is $500-$2,200. Sensor/harness fixes fall at the low end; turbo actuator, injector, aftertreatment component, or head gasket repairs fall at the high end. Detroit DDDL software and sometimes factory parameter reset are required for proper reset.

Mechanics Guide Step-by-step diagnosis

How Do You Diagnose DD-100-3?

  1. Probe sensor for 5V ref.

  2. Replace sensor.

Sources 1

This page is built from documented references. Verify against your own service info before repair work.

  • SAE J1939-73Application Layer: Diagnostics (defines the SPN/FMI fault-identifier framework)

Which Vehicles Commonly Get DD-100-3?

  • Freightliner Cascadia with DD15
  • Freightliner Cascadia with DD13
  • Freightliner Cascadia with DD16
  • Western Star 4700 with DD13/DD15
  • Western Star 4900 with DD15/DD16
  • Western Star 5700 XE with DD15
  • Freightliner M2 106 with DD13
  • Freightliner M2 112 with DD13

Explore More

More Detroit Diesel DD Series codes → Diesel home All diesel codes Heavy-duty Guides

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