NHTSA ID Number: 10057325
Manufacturer Communication Number: 0108-15
TSB/Document Date: 2015-05-15
Summary
DETROIT:SPN1323 THROUGH1328(MCM)(GHG14) REVISED CHANGES MADE TO BULLETIN. COMPLAINTS OF IDLE/ MISFIRE, FAULT CODE SPN1323/FMI31-GHG14. *LJ
SB-10057325-7762
1
01 08-15
01 08-15
SUBJECT
DATE
SPN 1323 through 1328 (MCM) (GHG14)
January 2015
Additions, Revisions, or Updates
Publication Number / Title
Platform
Section Title
Change
SPN 1323/FMI 31 GHG14
SPN 1324/FMI 31 GHG14
DDC-SVC-MAN-0084
GHG14 DD
Platform
SPN 1325/FMI 31 GHG14
SPN 1326/FMI 31 GHG14
The diagnostic procedures have been revised to include more in
depth inspection.
SPN 3127/FMI 31 GHG14
SPN 1328/FMI 31 GHG14
All information subject to change without notice.
01 08-15
Copyright © 2015 DETROIT DIESEL CORPORATION
3
2 SPN 1323/FMI 31 - GHG14
2
SPN 1323/FMI 31 - GHG14
Idle Smoothness Control/Cylinder #1 Misfire At Idle
Table 1.
SPN 1323/FMI 31
Description
This Fault Code Sets when the Motor Control Module (MCM) Detects
That Cylinder #1 Has Low rpm Speed with the Injector Commanded
to Max Fueling
Monitored Parameter
Engine rpm
Typical Enabling Conditions
Engine Speed Between 600 and 960 rpm, Engine Coolant
Temperature Greater Than 70°C (158°F), Engine Fuel Temperature
Greater Than 10°C (50°F)
Monitor Sequence
None
Execution Frequency
When Enabling Conditions Are Met
Typical Duration
30 Seconds
Dash Lamps
CEL, MIL
Engine Reaction
25% Derate, EGR is Shut Off
Verification
Start and Run the Engine Until Engine Coolant Temperature is
Greater than 70°C (158°F), Along with Engine Fuel Temperature
Greater Than 10°C (50°F). Then Let the Engine Idle for 10 minutes
Check as follows:
Possible causes:
•
•
•
•
•
•
•
•
•
•
•
Valve Lash Out Of Adjustment
Valve Train Damage/Failure
Bent Valve
Valve Face/Seat Damage
Stuck Jake Brake
Bearing Failure
Bent Connecting Rod
Cylinder Liner Damage
Piston Ring Damage
Failed Cylinder Head Gasket
Failed Fuel Injector
WARNING: PERSONAL INJURY
Diesel engine exhaust and some of its constituents are known to the State of California to cause
cancer, birth defects, and other reproductive harm.
• Always start and operate an engine in a well ventilated area.
• If operating an engine in an enclosed area, vent the exhaust to the outside.
• Do not modify or tamper with the exhaust system or emission control system.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level
surface, parking brake is set, and the wheels are blocked.
4
All information subject to change without notice.
Copyright © 2015 DETROIT DIESEL CORPORATION
01 08-15
01 08-15
CAUTION: ELECTRICAL SHOCK
To avoid injury from electrical shock, use care when connecting battery cables. The magnetic
switch studs are at battery voltage.
WARNING: BODILY INJURY
To avoid injury from a falling component, ensure an appropriately rated lifting device is used.
Moving the component without an appropriately rated lifting device could result in the component
falling, which could cause serious personal injury and component damage. Never stand beneath a
suspended load.
WARNING: PERSONAL INJURY
To avoid injury, never remove any engine component while the engine is running.
1. Connect DiagnosticLink ®.
2. Turn the ignition ON (key ON, engine OFF).
3. Check for injector circuit fault codes. Are fault codes SPN 1323/FMI 3 or FMI 4 present?
a. Yes; diagnose the circuit fault codes first. Verify repair.
b. No; Go to step 4.
4. Check for engine over speed fault codes. Are fault codes SPN 190/FMI 0, FMI 14 or FMI 15 present?
a. Yes; diagnose the other faults first.
b. No; Go to step 5.
5. Check the max camshaft speed. Is the max camshaft speed above 3000 rpm?
a. Yes; replace the camshafts.
b. No; Go to step 6.
6. Check for cam sensor or crank sensor fault codes. Are fault codes SPN 636/FMI 2, FMI 8, FMI 10, FMI 11, SPN
723/FMI 8, FMI 10, or FMI 11 also present?
a. Yes; diagnose the other fault codes first.
b. No; Go to step 7.
7. Does the engine exhibit knocking noise while running?
a. Yes; determine the cause of the noise. Repair as necessary.
b. No; Go to step 8.
8. Connect a battery charger to the vehicle to maintain sufficient battery voltage while cranking.
9. Use DiagnosticLink to perform the relative compression test. Refer to section "Relative Cylinder Compression Test". Is
the relative compression reading for cylinder #1 lower by more than 10% as compared to the highest cylinder reading?
a. Yes; Go to step 13.
b. No; Go to step 10.
10. Disconnect the battery charger.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level
surface, parking brake is set, and the wheels are blocked.
All information subject to change without notice.
01 08-15
Copyright © 2015 DETROIT DIESEL CORPORATION
5
2 SPN 1323/FMI 31 - GHG14
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area.
Engine exhaust is toxic.
11. Start and run the engine until the coolant temperature is greater than 70°C (158°F) and the fuel temperature is greater
than 10°C (50°F).
12. Use DiagnosticLink to check the cylinder Idle Speed Balance (ISB
) readings. Refer to section "Checking Idle Speed
Balance". Does cylinder #1 pass the ISB test?
a. Yes; refer to Technical Service letter 15 TS-1 for further instructions.
b. No; Go to step 23.
13. Turn the engine OFF.
14. Remove the rocker cover. Refer to section "Removal of the Rocker Cover".
15. Visually inspect the rocker arms, rollers on the rocker shafts and the lobes on the camshafts. Are the rocker arms,
rollers or camshafts damaged?
a. Yes; replace the damaged components.
b. No; Go to step 16.
16. Check the valve lash clearance for cylinder #1. Refer to section "Valve Lash Adjustments". Is the valve lash within
specification?
a. Yes; Go to step 17.
b. No; adjust the valve lash to the correct clearance. Verify repair.
17. Check the engine brake lash. Refer to section "Setting the Engine Brake Lash". Is the engine brake lash within
specification?
a. Yes; Go to step 18.
b. No; Go to step 19.
18. Inspect the engine brake piston actuator. Is the engine brake piston actuator constantly engaged or stuck in the extended
position?
a. Yes; replace the engine brake rocker arm. Refer to section "Removal of Camshaft and Rocker Shaft/Engine
Brake Assembly". Verify repair.
b. No; Go to step 21.
19. Turn the engine brake adjuster screw out to back off the actuator piston from the rocker arm.
20. Set the correct engine brake lash. Refer to section "Setting the Engine Brake Lash". Does the engine brake actuator
piston stick when adjusting the actuator?
a. Yes; replace the engine brake rocker arm. Refer to section "Removal of Camshaft and Rocker Shaft/Engine
Brake Assembly".
b. No; adjust the engine brake valve lash to the correct specification. Refer to section "Setting the Engine Brake
Lash". Verify repair.
21. Connect the battery charger to maintain proper cranking speed.
22. Perform the mechanical cylinder compression test. Refer to section "Mechanical Cylinder Compression Test". Is the
mechanical cylinder compression reading for cylinder #1 344 kPa (50 psi) lower than any of the other cylinders?
a. Yes; disconnect the battery charger and remove the cylinder head. Refer to section "Symptom Diagnostics - Low
Engine Compression" to check for the cause of the loss of compression.
b. No; remove the oil pan and inspect the bearings starting with the bearings near cylinder #1. Repair as necessary.
23. Turn the engine OFF.
24. Remove and inspect the engine oil filter. Refer to section "Replacement of the Oil Filter". Is there an excessive amount
of metal present in the oil filter?
a. Yes; remove the oil pan and inspect the bearings starting with the bearings near cylinder #1. Repair as necessary.
b. No; replace the fuel injector in cylinder #1. Refer to section "Removal of the Fuel Injector - Two-Filter System".
Verify repair.
6
All information subject to change without notice.
Copyright © 2015 DETROIT DIESEL CORPORATION
01 08-15
01 08-15
3
SPN 1324/FMI 31 - GHG14
Idle Smoothness Control/ Cylinder #2 Misfire At Idle
Table 2.
SPN 1324/FMI 31
Description
This Fault Code Sets When The Motor Control Module (MCM)
Detects That Cylinder #2 Has Low rpm Speed with The Injector
Commanded To Max Fueling
Monitored Parameter
Engine rpm
Typical Enabling Conditions
Engine Speed Between 600 And 960 rpm, Engine Coolant
Temperature Greater Than 70°C (158°F), Engine Fuel Temperature
Greater Than 10°C (50°F)
Monitor Sequence
None
Execution Frequency
When Enabling Conditions Are Met
Typical Duration
30 Seconds
Dash Lamps
CEL, MIL
Engine Reaction
25% Derate, EGR is Shut Off
Verification
Start and Run the Engine Until Engine Coolant Temperature is
Greater than 70°C (158°F), Along with Engine Fuel Temperature
Greater Than 10°C (50°F). Then Let the Engine Idle for 10 minutes
Check as follows:
Possible causes:
•
•
•
•
•
•
•
•
•
•
•
Valve Lash Out Of Adjustment
Valve Train Damage/Failure
Bent Valve
Valve Face/Seat Damage
Stuck Jake Brake
Bearing Failure
Bent Connecting Rod
Cylinder Liner Damage
Piston Ring Damage
Failed Cylinder Head Gasket
Failed Fuel Injector
WARNING: PERSONAL INJURY
Diesel engine exhaust and some of its constituents are known to the State of California to cause
cancer, birth defects, and other reproductive harm.
• Always start and operate an engine in a well ventilated area.
• If operating an engine in an enclosed area, vent the exhaust to the outside.
• Do not modify or tamper with the exhaust system or emission control system.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level
surface, parking brake is set, and the wheels are blocked.
All information subject to change without notice.
01 08-15
Copyright © 2015 DETROIT DIESEL CORPORATION
7
3 SPN 1324/FMI 31 - GHG14
CAUTION: ELECTRICAL SHOCK
To avoid injury from electrical shock, use care when connecting battery cables. The magnetic
switch studs are at battery voltage.
WARNING: BODILY INJURY
To avoid injury from a falling component, ensure an appropriately rated lifting device is used.
Moving the component without an appropriately rated lifting device could result in the component
falling, which could cause serious personal injury and component damage. Never stand beneath a
suspended load.
WARNING: PERSONAL INJURY
To avoid injury, never remove any engine component while the engine is running.
1. Connect DiagnosticLink®.
2. Turn the ignition ON (key ON, engine OFF).
3. Check for injector circuit fault codes. Are fault codes SPN 1324/FMI 3 or FMI 4 present?
a. Yes; diagnose the circuit fault codes first. Verify repair.
b. No; Go to step 4.
4. Check for engine over speed fault codes SPN 190/FMI 0, FMI 14 or FMI 15 present.
a. Yes; diagnose the other faults first.
b. No; Go to step 5.
5. Check the max camshaft speed. Is the max camshaft speed above 3000 rpm?
a. Yes; replace the camshafts.
b. No; Go to step 6.
6. Check for cam sensor or crank sensor fault codes. Are fault codes SPN 636/FMI 2, FMI 8, FMI 10 FMI 11, SPN
723/FMI 8, FMI 10, or FMI 11 also present?
a. Yes; diagnose the other fault codes first.
b. No; Go to step 7.
7. Does the engine exhibit knocking noise while running?
a. Yes; determine the cause of the noise. Repair as necessary.
b. No; Go to step 8.
8. Connect a battery charger to the vehicle to maintain sufficient battery voltage while cranking.
9. Use DiagnosticLink to perform the relative compression test. Refer to section "Relative Cylinder Compression Test". Is
the relative compression reading for cylinder #2 lower by more than 10% as compared to the highest cylinder reading?
a. Yes; Go to step 13.
b. No; Go to step 10.
10. Disconnect the battery charger.
WARNING: PERSONAL INJURY
To avoid injury before starting and running the engine, ensure the vehicle is parked on a level
surface, parking brake is set, and the wheels are blocked.
8
All information subject to change without notice.
Copyright © 2015 DETROIT DIESEL CORPORATION
01 08-15
01 08-15
WARNING: ENGINE EXHAUST
To avoid injury from inhaling engine exhaust, always operate the engine in a well-ventilated area.
Engine exhaust is toxic.
11. Start and run the engine until the coolant temperature is greater than 70°C (158°F) and the fuel temperature is greater
than 10°C (50°F).
12. Use DiagnosticLink to check the cylinder Idle Speed Balance (ISB) readings. Refer to section "Checking Idle Speed
Balance". Does cylinder #2 pass the ISB test?
a. Yes; refer to Technical Service letter 15 TS-1 for further instructions.
b. No; Go to step 23.
13. Turn the engine OFF.
14. Remove the rocker cover. Refer to section "Removal of the Rocker Cover".
15. Visually inspect the rocker arms, rollers on the rocker shafts and the lobes on the cam shafts. Are the rocker arms,
rollers or camshafts damaged?
a. Yes; replace the damaged components.
b. No; Go to step 16.
16. Check the valve lash clearance for cylinder #2. Refer to section "Valve Lash Adjustments". Is the valve lash within
specification?
a. Yes; Go to step 17.
b. No; adjust the valve lash to the correct clearance. Verify repair.
17. Check the engine brake lash. Refer to section "Setting the Engine Brake Lash". Is the engine brake lash within
specification?
a. Yes; Go to step 18.
b. No; Go to step 19.
- 💯【Conta.ct us for Support Directly】If you met any...
- 🔥🔥🔥【2026 AUTEL FLAGSHIP MK900BT MK900-BT, NEW...
- 🚗【3000+ ACTIVE TESTS (50➡3000+), SAME AS MS...
- 🚗【40+ HOT SERVICES FOR 150 MAKES (28+➡40+)】Full...
- 🚗【OE ALL SYSTEM DIAGNOSE, AUTO SCAN 2.0: SCAN LICENSE...
- 【TURN OFF CEL】 This AL319 car scanner diagnostic tool...
- 【EXTENSIVE APPLICATION】 Autel AL319 Compatible with...
- 【FOR END USER & DIYERS】 This error code reader AL319 is...
- 【USER-FRIENDLY DESIGN】 This OBD2 scanner and check...
- 【HIGH-QUALITY SERVICES】 12 months war.ranty from the...
Last update on 2026-06-23 / Affiliate links / Images from Amazon Product Advertising API
If the PDF is very large, it may not load in the preview below.
Some older TSBs had multiple PDFs — visit the NHTSA Website to view all PDFs.
If the TSB PDF does not show, download or view it on the NHTSA Website.
Click on the (+) Plus Sign
Then Click on Associated Document(s)
Search NHTSA Database for Recalls
Search NHTSA Database for Vehicle Investigations
View Latest Vehicle Investigations
Search NHTSA Database for Vehicle Complaints
View Latest Vehicle Complaints
TSB/Document ID: 0108-15
Replacement Service Bulletin Number:
MFR Communication Date: 2015-01-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
- [Notice] When you receive a used device, it may be a customer return resold by Amazon without inspection. You can exchange it for a new one through Amazon. As this situation is unavoidable, we sincerely apologize. For any issues, contacting us via Amazon's "Messages" is the best way. THINKSCAN 689BT Bidirectional Scan Tool Can Be Used Immediately After It is Turned On, Without Complicated Registration Process, Which is More Convenient & Quick.
- Full Bi-Directional Control & 3000+ Active Tests: Take control and test components like actuators, fuel injectors, relays, and cooling fans in real time. You’ll quickly see if the problem is in the part itself or the control module — saving you hours of guesswork and frustrating trial-and-error.
- Advanced ECU Coding Capabilities: Handle module matching and hidden feature activation with confidence. When you replace an ECU or want to customize settings, this obd2 scanner diagnostic bi directional tool gives you the professional-level capabilities you need without the dealership price tag.
- 34+ Useful Reset and Maintenance Functions: Complete everyday service tasks smoothly with a wide range of helpful reset and maintenance functions. Whether you’re keeping up with regular upkeep or tackling a specific job, this scanner makes maintenance simpler and less stressful for both DIYers and pros.
- Comprehensive Full System Diagnostics: Diagnose every major system — Engine, Transmission, ABS
, SRS, TPMS, and more — all in one place. Finally stop wondering if you’re missing something important; get the full picture and clear codes with ease.
Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API
- Top Reasons to Choose the D7S OBD2 Scanner: XTOOL D7S car scan tool, an upgrade of XTOOL D7, offers comprehensive features for automotive technicians, workshops, and DIY enthusiasts 1. Upgraded Hardware: 2+64GB memory, rear camera, intuitive interface, foldable bracket 2. Complete Diagnostics: FCA Autoauth, OE-level all system scan, 39+ maintenance services, 4K+ bidirectional, CANFD/DoIP protocol 3. Advanced Capabilities: ECU c0ding, PMI functions 4. Wide Compatibility: Support 10,000+ models, covering 99% vehicle brands 5. Multi-language: Available in 22+ languages, No IP Restrictions 6. 3-Year Updates: Save 300 bucks on software updates for the latest features and optimizations
- 2026 Upgraded D7S Car Scanner Features: The newly 2026 D7S V2.0 scanner for car brings exciting features for advanced vehicle diagnostics and enhanced user experience 1. FCA AutoAuth: Now supports FCA SGW module for Chrysler, for Jeep, for Dodge (2018+), for Fiat (2017+), enabling faster vehicle communication without gateway restrictions 2. PMI (Offline ECU Pr0gramming): Allows for Ford, for Lincoln, and for Mazda ECU pr0gramming for new modules 3. Optimized Diagnostic Report 2.0: Personalized reports with logos and customer info for auto shops. Note: Compatibility varies by cars, please check before order
- 39+ Services/Resets/Adaptations/Relearns/Calibrations: XTOOL D7S full system car scanner diagnostic tool tackles 99% of common car issues through its 36+ special functions, including Oil Reset, EPB, SAS, BMS, Throttle Reset, Injector C0ding, ABS Bleed, TPMS Reset, Power Balance, etc and also covers specific-vehicle functions like Crank Sensor Relearn, ABS Initialization, Cylinder Power Balance, Fuel Trim Reset, Idle Relearn etc. This car diagnostic scanner enhances efficiency, making repairs and maintenance hassle-free. Tip: DO NOT for All vehicles, please check compatibility first
- Cost-effective ECU C0ding Scan Tool for Specific Brands: Enhance your vehicle's performance with XTOOL D7S! This obd2 scanner all systems bidirectional offers advanced capabilities at an affordable price, supports online for BMW, for Benz and offline for BENZ, for MIT, along with PMI functions for Ford, for Mazda, and for Lincoln. Ideal for technicians and DIY enthusiasts, this automotive scanner diagnostic tool optimizes vehicle performance and enhances the driving experience. Note: Not for all cars and modules, please send car VIN to check the compatibility before purchase
- OE All System Diagnostic & 8 Pids Graphing: XTOOL D7S is a comprehensive all system bi directional obd2 scanner that delivers dealer-level diagnostics, completely controlling over your vehicle’s performance and health. This automotive scan tool can read and clear DTCs, view live data and ECU information, retrieve freeze frames, and perform active tests and full obd2 functions. This bi-directional scan tool can can identify your vehicle's make, model, and year information with just one click and show up to 8 PIDs live data with options for CSV viewing, playback, and recording for in-depth analysis. It is easy-to-use for both professionals and beginners, helping pinpoint issues efficiently
Last update on 2026-06-30 / Affiliate links / Images from Amazon Product Advertising API
- 【✅Compared to BOSSCOMM IF742, IF745 Offers Full-System Diagnostics】The BOSSCOMM IF745 car diagnostic scanner is an upgraded model of IF742. In addition to supporting all OBD2 Code Reader functions and 6 reset options (ABS/EPB/SAS/BMS/Oil/Throttle), it expands diagnostics from 4 systems (Check Engine/ABS/SRS/Transmission) to vehicle All systems, including Steering, Suspension, and Body Electronics. This provides deeper, more comprehensive diagnostic capabilities.
- 【✨10 OBD2 Functions】The BOSSCOMM IF745 scan tool’s DTC Lookup instantly translates fault codes into user-friendly explanations, its I/M Readiness feature streamlines emissions testing with a single tap, and Freeze Frame lets you pinpoint the exact moment of a fault for in-depth root-cause diagnosis. Combined with a live data dashboard and advanced diagnostics (O2S, OBMon, EVAP), it delivers comprehensive insights for confident troubleshooting.
- 【✨Deep Diagnostics for All Vehicle System Modules】Beyond code reading/clearing and ECU information retrieval, our all-in-one data stream feature lets you inspect all current fault codes and their locations across the vehicle’s systems. This vehicle code reader helps you turn off dashboard warning lights and perform a comprehensive self-check of your car at home—no more back-and-forth trips to the repair shop or hefty inspection fees.
- 【✨6 Essential Resets: ABS Bleeding, Oil, EPB, SAS, Throttle, BMS】The BOSSCOMM IF745 obd2 scanner diagnostic tool swiftly purges air from brake lines to restore braking sensitivity, fine-tunes maintenance cycles to eliminate false alerts, resolves parking brake issues with one-click control, recalibrates steering sensors for stability, optimizes engine idling/acceleration for smoother performance, and deeply resets battery systems to extend lifespan and range via precise parameter adjustments.❗NOTE: Does NOT support bidirectional control, coding, or programming.
- 【✨10,000+ Car Models, AutoVIN, 13 Languages】The BOSSCOMM IF745 vehicle scanner diagnostic tool covers 73+ global car brands and offers support in 13 languages, making it perfect for DIYers, auto mechanics, or as a thoughtful gift. With a single-click AutoVIN feature, it instantly retrieves vehicle serial numbers, streamlining diagnostics for users globally. This adaptable tool balances user-friendliness with precision, catering to both personal and professional requirements.✅Unsure about compatibility? Compatibility will vary on vehicles' model and year, pls reach us via 📧 [email protected] 📧 before purchase.
Last update on 2026-07-02 / Affiliate links / Images from Amazon Product Advertising API
This product presentation was made with AAWP plugin.