DD-3464-31 critical Detroit Diesel DD Series ›

Cylinder Head Pressure Excessive

The DD-3464-31 (Detroit Diesel DD Series) diesel fault code means: Cylinder Head Pressure Excessive. This is a critical severity code.

This is a standard J1939 fault, not a proprietary code. DD-3464-31 is how this equipment displays SPN 3464 with FMI 31 (condition exists) 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.

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Keep driving?
No — stop driving
DIY difficulty
advanced
Estimated cost
$2,500-$6,500
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What Are the Symptoms of DD-3464-31?

  • Check Engine Light / Amber Warning Lamp illuminated
  • Red Stop Lamp on, engine derate or forced shutdown
  • Exhaust in coolant
  • Noticeable power loss under load

What Causes DD-3464-31? (Most Likely First)

  • Head gasket failure (DD15 pre-GHG17) Very Likely
  • Cracked cylinder head Possible
  • Failed cup seal in head (DD15) Likely

Can I Still Drive with DD-3464-31?

No — stop driving. DD-3464-31 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 is Detroit Diesel fault code DD-3464-31?

Detroit Diesel fault DD-3464-31 (SPN 3464 FMI 31) indicates: Cylinder Head Pressure Excessive. It is a critical-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-3464-31?

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-3464-31?

Estimated repair cost is $2,500-$6,500. 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-3464-31?

  1. Shop-level repair — pull head and inspect.

  2. Look for cup seal failure (common DD15 issue).

  3. Replace head gasket + new cup seals as an assembly.

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-3464-31?

  • 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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