Intake Manifold Temperature High
The DD-105-0 (Detroit Diesel DD Series) diesel fault code means: Intake Manifold Temperature High. This is a moderate severity code.
This is a standard J1939 fault, not a proprietary code. DD-105-0 is how this equipment displays SPN 105 with FMI 0 (data valid but above normal — most severe) 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.
- Keep driving?
- Yes, with caution
- DIY difficulty
- intermediate
- Estimated cost
- $500-$2,200
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What Are the Symptoms of DD-105-0?
- Check Engine Light / Amber Warning Lamp illuminated
- Engine derate (reduced torque / 5 mph limp)
- Noticeable power loss under load
What Causes DD-105-0? (Most Likely First)
- Failed CAC (charge air cooler) — ineffective Likely
- Ambient heat soak at low speed Possible
- Sensor reading incorrect Likely
- Cooling fan not engaging Possible
Can I Still Drive with DD-105-0?
Yes, with caution. DD-105-0 is rated moderate severity. Keep trips short and get it diagnosed soon rather than waiting for symptoms to worsen.
Frequently Asked Questions
What is Detroit Diesel fault code DD-105-0?
Detroit Diesel fault DD-105-0 (SPN 105 FMI 0) indicates: Intake Manifold Temperature 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-105-0?
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-105-0?
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-105-0?
Compare MAT to ambient — should be within 20F of ambient after cool start.
Inspect CAC core for bent fins or oil contamination.
Verify fan clutch engages at set point.
Replace MAT sensor if readings are implausible.
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- John Deere Operator's Manual, PowerTech 4.5 L and 6.8 L Tier 2 OEM Diesel Engines, OMRG33324 (Issue 16Feb04), reproduced as a supplement in Genie's telehandler parts library (doc 237949), "Listing of Diagnostic Trouble Codes"printed page 45-26: SPN 105 FMI 00, "Manifold Air Temperature Extremely High". The table is that engine maker's; it establishes what the J1939 SPN-FMI pair means, not that a Detroit Diesel display shows it.
- Deutz TCD 2.2 L3 Engine Fault Codes table, printed in the Genie SX-135 XC Service and Repair Manual, Part No. 1263383GT, April 2023printed page 162: SPN 105 FMI 0 (DTC 1397), "Engine intake manifold 1 temperature above normal operational range". The table is that engine maker's; it establishes what the J1939 SPN-FMI pair means, not that a Detroit Diesel display shows it.
Which Vehicles Commonly Get DD-105-0?
- 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
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