NHTSA ID Number: 10167594
Manufacturer Communication Number: K76992557
TSB/Document Date: 2019-11-12
Summary
Aftertreatment Hydrocarbon Injector (AHI, 7th Injector) Changes Between US10 And US17 (GHG17, Common Rail Fuel System) - Chassis Experiencing High soot Accumulation, Abnormal ( Too High, Overtemp, Too Low ) Regeneration Temperatures Following An Aftertreatment Hydrocarbon Injector Nozzle Replacement Procedure
Solution K76992557
Monday, November 4, 2019 9:34:33 PM CET
** SOLUTION **
Title
Aftertreatment Hydrocarbon Injector (AHI, 7th Injector) Changes Between US10 And
US17 (GHG17, Common Rail Fuel System) - Chassis Experiencing High soot
Accumulation, Abnormal ( Too High, Overtemp, Too Low ) Regeneration Temperatures
Following An Aftertreatment Hydrocarbon Injector Nozzle Replacement Procedure
ModelsLEU , LR , MRU - TerraPro , TE - TerraPro , AN - Anthem , CHU - Pinnacle, Axle
back , CXU - Pinnacle, Axle front , GR - Granite , GU - Granite , PI - Pinnacle , TD Titan
VNL , VNM , VNR , VNX , VAH , VHD , VT
Emission Standard
Emission Standard
US10 , US10+OBD13 , US14+OBD13 , US14+OBD15 , US14+OBD16 , US14 CNG
, US17 , US17+OBD16 , US17+OBD18
Engine family
Engine family
11L Engine , 13L Engine , 16L Engine , MP7 , MP8 , MP10
** SOLUTION **
Cause
Solution
Incorrect part number ( P/N ) AHI nozzle ( 7th Injector ) may have been installed.
Model Year ( MY ) US17 changes to the AHI system have been made. MY US17 has been
updated to a High flow nozzle.
The low flow nozzle has been used for North American heavy duty engines since
2011. All US17 11L and 13L engines will now use the high flow nozzle ( 16L
engines will continue to use the low flow nozzle ).
The AHI nozzle tip of the low flow and the high flow nozzle are different in
appearance. Other than this difference, the two nozzles are visually the same.
NOTE: The high flow and the low flow aftertreatment hydrocarbon dosers
have different flow rates.
The difference between the aftertreatment hydrocarbon doser flow tests can be seen
below.
High flow aftertreatment hydrocarbon doser
Low flow aftertreatment hydrocarbon doser
Solution visibility
Dealer distribution
Function(s)/component(s) affected
Function affected
DOC , DPF , Fuel Dosing
Function Group
Function Group
258 emissions after-treatment
Customer effect
Main customer effect
soot , regeneration , temperature , efficiency/abnormal behavior
Fluid implicated
Fuel
Conditions
Vehicle operating mode
Frequency of occurrence of
problem
when driving , when stationary
always
Administration
Author
A241298
Last modified by
A241298
Creation date
18-10-2017 16:10
Date of last update
16-10-2019 16:10
Status
Published
Average score
5
Number of scores
1
UNCONTROLLED COPY. Printed document is for temporary use only and should not be retained.
- Restores fuel economy
- Stabilizes ethanol
- Maximizes horsepower
- Improves responsiveness
- For use in both gasoline and diesel engines
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TSB/Document ID: K76992557
Replacement Service Bulletin Number:
MFR Communication Date: 2019-10-16
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL SYSTEM, GASOLINE
MFR Component System:
MFR Component Subsystem:
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