NHTSA ID Number: 10163644
Manufacturer Communication Number: TSB180047-071720
TSB/Document Date: 2019-08-12
Summary
This Technical Service Bulletin describes the verification and resolution to discolored diesel exhaust fluid (DEF) dosing unit heater elements caused by chemical reactions between the aluminum housing and DEF, DEF dosing valve inlet screen can become plugged with debris when corrosion on the DEF dosing unit heating element flakes off, and/or a plugged DEF dosing valve inlet screen will typically lead to FC1682, FC3574, and/or FC3596.
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)
- 💝【Questions? We’re Here Anytime】MK808S is a...
- 🔥🔥🔥【2026 NEWLY RELEASED BI-DIRECTIONAL...
- 【28+ MOST POPULAR RESET SERVICE FOR 150 MAKES】Autel...
- 【ALL SYSTEM DIAGNOSTICS, FACTORY-LEVEL SCANNER】The...
- 【AUT0 SCAN & AUT0V1N, 10X FASTER】How much have you spent...
- 💯【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...
This product presentation was made with AAWP plugin.
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: TSB180047-071720
Replacement Service Bulletin Number:
MFR Communication Date: 2019-07-17
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: FUEL SYSTEM, DIESEL
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Aftertreatment Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration
Page 1 of 9
Technical Service Bulletin
Technical Service Bulletin:
Released Date: 17-Jul-2019
TSB180047
Aftertreatment Diesel Exhaust Fluid Dosing Unit Heating Element
Discoloration
Aftertreatment Diesel Exhaust Fluid Dosing
Unit Heating Element Discoloration
Warranty Statement
The information in this document has no effect on present warranty coverage or repair
practices, nor does it authorize TRP or Campaign actions.
Contents
Product Affected
•
•
•
•
•
•
•
•
•
•
•
•
B6.7 CM2350 B121B
L9
CM2350 L116B
X12 CM2350 X119B
X15 CM2350 X114B
X15 CM2350 X116B
QSK19 CM2350 K105
QSK50 CM2350 K108
QSK60 CM2350 K116
QSK60 CM2350 K117
QSK60 CM2350 K121
QSK78 CM2350 K126
QSK95 CM2350 K113
Issue
Symptom:
• Diesel exhaust fluid (DEF) dosing unit heater elements can be discolored caused by
chemical reactions between aluminum housing and DEF.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html
7/19/2019
Aftertreatment Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration
Page 2 of 9
• DEF dosing valve inlet screen can become plugged with debris when corrosion on
the DEF dosing unit heating element flakes off.
• A plugged DEF dosing valve inlet screen will typically lead to FC1682, FC3574,
and/or FC3596.
Note : Additional DEF system related fault codes can be present.
Verification/Confirmation
Verify symptoms and/or listed Fault Codes are present.
Resolution
If DEF dosing valve inlet screen is found to be plugged with debris, and corrosion on
DEF dosing unit heating element is flaking off:
• DEF dosing unit and DEF dosing valve inlet screen must be replaced. DEF pressure
line, between DEF dosing unit and DEF dosing valve must be flushed with distilled
water to remove any residual debris.
• See Figure 1 for an example of a plugged DEF dosing valve inlet screen.
• See Figure 2 for an example of a DEF dosing unit heating element with corrosion
that is flaking off.
If DEF dosing valve inlet screen is not plugged with debris and there is corrosion on DEF
dosing unit heating element, but is not flaking off:
• Do not replace DEF dosing unit (for this condition). All DEF dosing units will have
some level of discoloration/corrosion internally.
• See Figure 3 for an example of a clean DEF dosing valve inlet screen.
• See Figures 4, 5, and 6 for examples of DEF dosing units with acceptable levels of
discoloration/corrosion.
Note : If DEF dosing valve inlet screen was removed from DEF dosing valve
during inspection, DEF dosing valve inlet screen, Part Number 5372671, must
be replaced.
Part Identification
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html
7/19/2019
Aftertreatment Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration
Page 3 of 9
Figure 1, Plugged DEF Dosing Valve Inlet Screen.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html
7/19/2019
Aftertreatment Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration
Page 4 of 9
Figure 2, Corroded DEF Dosing Unit Heating Element
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html
7/19/2019
Aftertreatment Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration
Page 5 of 9
Figure 3, Normal DEF Dosing Valve Inlet Screen.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html
7/19/2019
Aftertreatment Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration
Page 6 of 9
Figure 4, Normal DEF Dosing Unit Heating Element Discoloration.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html
7/19/2019
Aftertreatment Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration
Page 7 of 9
Figure 5, Normal DEF Dosing Unit Heating Element Discoloration.
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html
7/19/2019
Aftertreatment Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration
Page 8 of 9
Figure 6, Normal DEF Dosing Unit Heating Element Discoloration.
Affected UL2 DEF dosing unit parts numbers can be seen in Table 1:
Table 1: Affected DEF dosing unit part numbers
CES Part Number
EBU Part Number
A052Y605
4388105
A051F964
4377994
A047H782
4353810
A050G798
4377364
A055B124
5373865
A055B125
5373866
A057Y382
5375478
A057Y387
5375479
A057Y445
5375480
A057Y212
5375481
A057Y215
5375482
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html
7/19/2019
Aftertreatment Diesel Exhaust Fluid Dosing Unit Heating Element Discoloration
Page 9 of 9
Document History
Date
Details
2018-4-13
Module Created
2018-6-1
Non-Product Problem Solving (PPS)
2019-6-5
added Part Number 5372671 reference
2019-7-17
Added engines to product affected section
Last Modified: 17-Jul-2019
https://quickserve.cummins.com/qs3/pubsys2/xml/en/tsb/2018/tsb180047.html
7/19/2019
- OBD2 Bluetooth Scanner Lifetime Update: Ediag Elite offers revolutionary Advantage Lifetime Updates with unlimited access to the superior 15+ reset service, bidirectional testing and full system diagnostics.The Ediag Elite is an excellent Bluetooth OBD2 scanner diagnostic tool ideal for DIY's and private car owners.
- Bidirectional Test for Quickly Locating Problems: The Bidirectional Scan tool allows you to send commands directly from your smartphone to your vehicle for active testing. This feature helps to quickly narrow down problems such as air conditioning clutches, windows, doors, sunroofs, etc., reducing diagnostic time for mechanics and helping DIY users locate faults more easily. In addition, Ediag Elite provides fault analysis and repair guidance to help you solve problems efficiently.
- 15+ Maintenance Resets: The current version introduces 15+ popular special features: Oil Reset, Headlight Matching, Bleeding Reset, TPMS Reset, BMS Reset, Gear Box Relearn, Throttle Learning, Injector Coding, SAS Reset and more special functions in system diagnose menu. These functions make it easy for owners to carry out the necessary maintenance and servicing, ensuring that your vehicle stays in top condition, prolonging its service life and preventing common problems and breakdowns. Note: The Special function vary by model& year, Reach us check compatibility.
- Wide Compatibility CANFD & FCA
Autoauth: Compatible with GM, Ford, Toyota, Chrysler, Honda, Mazda, Nissan, Mitsubishi, Hyundai, KIA with standard OBD2 port from 1996 to newer. More car brands and features will be released gradually. Newest Ediag Elite scanner supports CANFD Protocol and FCA cars. Note: Coverage may vary on different vehicle by model& year ,Please contact us to confirm compatibility before purchase. - Perfect for Monitoring The Health of Your Vehicle: Ediag Elite is designed to make vehicle maintenance simple and efficient. With intelligent Auto VIN quick recognition, it is easy to connect to your car without the need for manual input. Real-time data is visualized in a variety of formats, including graphs, numeric, meter displays and clear 4-in-1 data charts, allowing you to effortlessly monitor real-time data. Data logging/reporting is available for playback and further analysis
- No Annual Fees & 2026 Upgraded CAN FD: Why pay $199/year or more for updates? The 2026 newest Kingbolen K7 obd2 scanner features have been upgraded to Lifetime Updates without subscription fees, saving you significant costs in the long run. K7 scan tool also adds the CAN FD protocol for the latest GM models (2019+), enabling faster data transfer, reducing the risk of undetected errors
- 2026 Newest Top-tier Car Scanner: Kingbolen K7 diagnostic scan tool is equipped with most capabilities for daily repair/maintenance: Wireless diagnosis via Bluetooth, Bidirectional Test, ECU Online/Offline Code, 31+ Resets, PMI for Ford, Lincoln, Mazda, Global version for 100+ brand vehicles and 17 languages, no area limit, FCA AutoAuth
- OE-Level Full Systems Scan Tool: K7 professional diagnostic scanner with Auto Vin can do one-click to scan ECUs on most of vehicles, like pcm, ecm, eps, bcm, tpms, sas, a/c system... to read/clear code, view live data, freeze frame, read ecu info. 4-in-1 data stream graphics can make data viewing more intuitive. Detailed diagnostic reports will help you easily master the car situation as it can be shared by bluetooth or email! Adding workshop information can help your customers to know more
- Bidirectional Test/Active Test & ECU Code: Stop guessing and start fixing. Bidirectional scan tool Kingbolen K7 can perform real active test that can send commands to the vehicle's ECU to drive the actuators to work, like window, rear mirrors, sunroof, door, solenoids, wipers, headlamp, etc, helping you quickly find out bad parts and pinpoint faulty issues. K7 bidirectional scanner will be a good choice to save money and time on car repairs when performing complex maintenance and repair
- 31 Reset Functions: Avoid expensive dealership visits for simple services. Experience tells us that just a small repair service may cost a lot of money. Kingbolen K7 is a professional diagnostic scanner with 31 common maintenance services like Oil /SAS/EPB/TPMS Reset, Battery Matching, ABS Bleeding, Injector Code, etc. It effectively handles most of the car reset and relearning jobs, perfect for experienced DIYers and mechanics. Note: Functions in the menu vary across vehicles. Kindly check the compatibility before purchase
- WHY S608 STANDS OUT:2026 Kingbolen S608 is the only scanner <200 bucks that offers powerful active tests on Engine, ABS, SRS, and Transmission systems. Offers 9 resets,Covers 110+ global brands with a 6.2'' larger touchscreen
- KINGBOLEN'S NEW BIDIRECTIONAL SCAN TOOL: As the 2026 upgraded version of S600, our Newest S608 obd2 scanner has the powerful Bi-directional Control on Engine, ABS, SRS, and Transmission systems. It can send commands to the ECUs of actuators for functional tests and work status checks, such as ABS, fuel injectors, adjusting throttle, coolant pumps, EVAP test, fuel trim reset, etc. No more Guesswork. Quickly identify problem components without teardown, get fuss-free results in seconds.
- 【9 HOT RESET SERVICES CAR SCANNER】Tired of costly mechanic trips for common resets? The Kingbolen S608 obd2 scanner lets you do it yourself, even for beginners—quickly and effortlessly! It offers 9 hot reset functions: Oil/EPB Reset, ABS Bleeding, SAS Calibration, DPF Regeneration, Injector Coding, BMS Matching, Throttle Adaptation, Gear Learning. Stop paying mechanics for 5-minute jobs. Save hundreds per year! 🚗*Function vary from vehicle models. reach us to check compatibility firstly!
- 【4 SYSTEM DIAGNOSTIC TOOL + FULL OBDII FUNCTIONS】Kingbolen S608 is an OBDII scanner and 4 systems diagnostic tool made for home mechanics, DIYers, and professionals. You can access Engine, ABS, SRS, Transmission fault codes, track live data in graphs, and onboard DTC library lookup to find the right troubleshooting procedure, and diagnose with full 10 OBD2 test modes to fix most of emission issues. Give your aging cars routine maintenance to avoid costly repairs, a breakdown, or even a crash.
- 【NEW CAN FD, FCA/RENAULT SGW, 140+ BRANDS】Kingbolen S608 scanner for car supports 140+ vehicle brands, 100,000+ models, 28 languages and can be used worldwide. S608 stays up-to-date with modern vehicles, allows secure access to 2017+ FCA cars and 2015+ Renault cars (📢*Need to purchase an AutoAuth/Renault account by yourself), and supports the latest CAN-FD protocol for 2019+ GM/Chrysler, enabling 2X faster data transfer and more precise diagnostics. 🚗*Check compatibility before purchase.
This product presentation was made with AAWP plugin.
Last update on 2026-05-12 / Affiliate links / Images from Amazon Product Advertising API