KC-537

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Diagnostic Trouble Codes (DTC) P20EE And P103C,
Diagnostic Procedure; - US17+OBD16 and
US17+OBD2018 Emissions, Model Year 2018,2019
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5 JANUARY 2020 UPDATE
There is no longer an eService case required for ANY STEP o
f the process below. A case should ONLY BE OPENED if furt
her assistance is required to complete diagnosis.
If test results determine an SCR replacement is required, A
CASE IS NOT REQUIRED TO ORDER A REPLACEMENT.
Cases submitted solely to request approval to replace an S
CR WILL BE REFUSED.
PRIOR TO PROCEEDING
Review open campaigns for the vehicle and ensure that it i
s NOT listed for Recalls EC0020a, EC0022a, EC0022b, or EC00
22c.
IF THE CAMPAIGN APPLIES TO THE VEHICLE:
• No diagnostics are necessary.
• No eService case is necessary.
Follow the recall instructions if the vehicle is listed. This sol
ution should only be utilized if the vehicle is not included in
any of the recalls.
CASES AND DIAGNOSTIC TIME REQUESTS OPENED FOR CHAS
SIS AFFECTED BY ONE OF THE ABOVE RECALLS WILL BE REFU
SED.
**IMPORTANT**
If this solution is being reviewed for P225E-00, solution CBR107 must be utilized FIRST, and this solution should only be
UI
; Live
followed if the NOx sensors are determined to be functioni
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ng properly. The tests performed in CBR-107 do not need to
be duplicated for this solution.
The following checklist should be used for
diagnosis of P20EE or P103C on GHG17 chassis
instead of Guided Diagnostics.
DO NOT REPLACE ANY PARTS UNTIL ALL ACTIVITIES
LISTED IN THIS CBR ARE COMPLETE.
NOTE: The Malfunction Indicator Lamp ( MIL ) may still be lit
even if P20EE shows inactive on a DTC Readout.
I. Vehicle Emissions Level
Review the vehicle emissions level
• Details can be found in the Product Details box on the
Product tab in PTT as seen below:
• If the vehicle is US17+OBD16 or US17+OBD2018:
; Live UI
• Perform Sections II and III below, then:
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II. Vehicle History
• The following information should be obtained
prior to beginning diagnosis.
- Is this the chassis's rst visit to the dealer for either of
these codes?
- Have there been any previous failures or problems that
may have caused problems with the Exhaust Aftertreatment
System (EATS)?
○ Examples:
- Turbocharger failure
- EGR Cooler failure
- Coolant passage through the exhaust
- Excessive fuel through the exhaust (Injector failure,
AHI failure)
- DPF failure
- Contaminated DEF
III. Check the DTC Readout
• Are there any other NOx sensor DTCs present?
- P225E and P0422 are very similar to P20EE and should be
checked with the same steps below.
- Any other NOx sensor codes may suggest intermittent
NOx sensor failure.
• Are there any codes present for other engine components
that would indicate an issue contributing to or causing
either P20EE or P103C?
- Examples:
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○
○
○
○
○
EGR System
Fuel System ( Includes AHI)
Turbocharger/Boost
DPF
Exhaust temperature
IV. Check SCR E
ciency Evaluations
- SCR E ciency values can be found in Premium Tech Tool (
PTT ) Operation 2589-08-03-05 Aftertreatment Selective
Catalytic Reduction (SCR) System.
• The last ve e ciency evaluations are displayed as shown in
the screenshot above.
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- If all ve tests are below the fault limit, SCR conversion
has been poor for an extended amount of time.
- If only one or two are below the fault limit, conversion
is only intermittently poor.
○ Information on driving conditions when the
poor conversion is occurring may provide insight
into the cause of the codes.
V. SCR System Checks
All steps below should be performed to verify
proper function of each component.
1. Check DEF quality with a refractometer
2. Physically check for any contamination in the DEF tank
• Examples
-
Dirt or Debris
Coolant
Water
Fuel
Oil
3. Physically inspect the DEF Dosing Valve, Di user Pipe,
and SCR Inlet for crystallized DEF
• Ensure there is no signi cant/excessive crystal buildup in
any component.
- NOTE: A small amount of crystal accumulation is
normal.
• If signi cant accumulation is noted clean it as rst
step and then ensure that the DEF dosing valve is correctly
installed with all gaskets and clamps positioned properly.
4. Perform DEF Dosing Test 2 to con rm proper function
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• Located in Operation 2589-08-03-05 Aftertreatment
Selective Catalytic Reduction (SCR) System.
- Test B from the rst screen of the operation
• Test two is the Small Dosing Test
- The test should be run twice and results noted to an
accuracy of 2 milliliters
- Nominal Volume is 55 mL
○ Acceptable range is 55 mL ± 3 mL
5. Check the Main Software part number for the Engine
Control Module (EMS).
If vehicle has Turbo-compound system, then do not
update EECU MSW. Only EECU MSW 23470187 and older
have capability to run NOx conversion test on Turbocompound vehicles.
If vehicle has VGT system, then update EECU MSW to
23766686 or newer.
6. If vehicle has a Turbo-compound System, run NOx
Conversion, Operation 2549-08-03-03. (only possible if vehicle
still has 23470187 and older EECU MSW).
7. If vehicle has a VGT System run Exhaust After-treatment
System Analysis, Operation 2589-08-03-18.
Make sure to select only SCR efficiency(priority) and NOx sensors (2nd
priority), during selec on phase of the test.
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VI. eService Case
If further assistance is required to complete
diagnosis and an eService case is opened, the case
MUST INCLUDE:
1. The vehicle history as described in Section I.
2. A complete DTC Readout from the time of the vehicle's
arrival.
3. Screenshots of:
• SCR E ciency values as shown in Section III
• The NOx Conversion Test as shown in the picture in
Section IV.
NOTE: Refer to CBR Solution KC-908 - Methods For
Taking A Screenshot
4. A description of ndings for each item checked in Section
IV, including numerical values for the dosing tests ("Good",
"Okay", "In spec", etc. are not acceptable values).

Tags
p042200
p0422-00
k65527708
p103c00
p103c-00
mack
p20ee00
p20ee-00
p225e00
p225e-00
volvo
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Methods For Taking A Screenshot / Screen
Capture For eService Cases Or Other Use;
Premium Tech Tool ( PTT ) And Other Software
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Overview
There are a variety of reasons a screenshot may be needed for review.
Diagnostic Trouble Code Readouts, PTT errors, product or control unit
information, diagnostic test results, steps and messages, and
oscilloscope readings name a few.
There are tools available to capture a screenshot, and Windows itself
also has the ability to copy a screenshot to the clipboard without
launching a program. This solution will cover the two methods that can
be used on most every computer. If there is other imaging software
installed on a computer that allows screen captures (Snagit, Jing, and
FastStone Capture are a few examples), the software instructions will
need to be followed.
Procedure
I. Using The Windows Snipping Tool
Computers running Windows XP or newer ( Windows 7, Windows 8,
Windows 10) have the Snipping Tool utility installed as part of the
Windows software package. The Snipping Tool allows shots to be taken
of speci c parts of the screen, speeding the process of capturing and
saving a screenshot.
For Windows XP, Windows 7, and Windows 10:
1. Click on the Start Menu, then mouse over or click on All Programs:
; Live UI
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2. Scroll through the list of programs and nd the Accessories folder:
3. Click on the Accessories folder, then nd the Snipping Tool. Click to
open the program.
For Windows 8:
1. Click the Start button to bring up the Start Screen
2. Click the Search button (magnifying glass) in the upper right-hand
corner of the screen
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3. Type "Snipping" into the search bar. Click on Snipping Tool to open the
program
For all Windows versions:
4. The Snipping Tool will open ready to capture a shot. The cursor should
change to a cross icon. If the capture doesn't start automatically, click the
New button in the Snipping Tool Window.
4a. Move the cursor to where one corner of the screenshot should be.
Click and hold the left mouse button, then drag the mouse to the
opposite corner of the desired shot:
4b. When the left mouse button is released, Snipping Tool will capture
the highlighted area and open it in a preview window:
; Live UI
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5. If a shot of a complete window is needed, click the dropdown icon
(down arrow) next to the New button in the Snipping Tool and select
Window Snip. Clicking once on the desired window to copy will open a
screenshot of the full window in the preview pane:
6. Click on the Save (Disk) icon in the preview window. Save the le to
desktop or a folder where it can be located. Attach the le to the eService
case as needed.
II. Using The Print Screen Key
1. If the screenshot will be of a speci c window, make sure the window is
maximized rst.
2. To capture a screenshot of the full screen, press the Print Screen key
on the keyboard. NOTE: Many laptops have Print Screen sharing a key
with another function. It may be necessary to hold the Function key
(Usually marked as Fn) as Print Screen is pressed
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Wired keyboard
Content creation stages KC-908
Laptop keyboard
2a. If taking a shot of a speci c window, holding the Alt key and pressing
Print Screen (Alt+Fn+Print Screen on a laptop) will only capture the
contents of the currently selected window
Wired keyboard
Laptop keyboard
3. Open MS Paint
• For Windows XP and Windows 7 Paint is located in the Accessories
folder of the Start menu, follow the above steps for locating Snipping
Tool
• For Windows 8 Follow the steps for the Snipping Tool above to go to
the Search box on the Start screen. Search for Paint
4. With Paint open, press either Ctrl+V on the keyboard to paste the
screenshot, click the Paste button in the upper left-hand corner of the
screen (Windows 7), or select Paste from the Edit menu at the top of the
screen (Windows XP). The screenshot will appear in the drawing area.
5. Save the screenshot to Desktop or another folder where it can be
easily located. Attach it to the eService case as needed.
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k52225504
us04
us07
us10
us10+obd13
us14+obd13
us14+obd15
us14+obd16
us17+obd16
us17+obd18
vn
vt
mp8
cu9
11l engine
13l engine
mp10
leu
cu15
lr
an - anthem
cu12 cng
mp7
cu9 cng
mru - terrapro
te - terrapro
axle back
axle front
pi - pinnacle
vhd
16l engine
chu - pinnacle
cxu - pinnacle
vah
gr - granite
td - titan
ch
chn
cl
ctp713
ctp713b
cv
cxp612
cxp613
cxu613
dm
dm6
mh
Mr.
mr6
dmm
rb6
fdm
rd
le
rd6
cx
gu - granite
rd8
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Selective Catalytic Reduction ( SCR ) E ciency And
NOx Sensor Diagnostic Trouble Codes ( DTC )
P225C, P225E, P221A and P2201: NOx Sensor
Diagnostic Information TO BE USED BEFORE
SENSOR REPLACEMENT - OBD13 And Newer
Emissions (Commonly Model Year 20
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DO NOT REPLACE EITHER NOx SENSOR FOR ANY OF
THE FOLLOWING CODES (P2201, P221A, P225C,
P225E, P20EE, P207F, P103C) PRIOR TO REVIEWING
THE INSTRUCTIONS BELOW
The purpose of this article is to prevent unnecessary component
replacement. ALL OTHER DIAGNOSTIC TESTS AND CHECKS MUST
BE PERFORMED when diagnosing one of the codes above if the
tests below do not immediately reveal an issue.
If an eService case must be submitted, ALL
INFORMATION speci ed in Step Five MUST be included at the
time the case is opened. Cases missing required information will
be Refused.
Overview
Guided Diagnostics for SCR e ciency or NOx sensor fault codes will
often result in No Fault Found. This often leads to replacement of one
or both sensors despite no indication from diagnostic steps to do so.
NOx sensor function is a possible cause, and is listed as such for the
code description in the DTC description in Premium Tech Tool ( PTT ).
However although the sensors themselves are a possibility, NOx
sensor codes are most often a symptom, not a cause of
emissions issues. NOx sensors should be con rmed to be reading
incorrectly or functioning erratically before they are replaced.
Fault Codes
A complete list of DTCs related to this Solution can be found in the
Fault Codes section below.
Procedure
UI
; Live
- Review the Detailed Status Information for the relevant code
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on the DTC Readout.
• If Con rmed DTC is TRUE: Proceed with diagnostics
• If Con rmed DTC is FALSE: Disregard and focus on other
symptoms or DTCs relevant to the complaint.
- A NOx Conversion should be run to check NOx sensor signal and
function for any of the above codes.
NOTE: A NOx conversion test only checks NOx sensor function. The
test compares the readings of the two sensors as the engine cycles
through multiple conditions to con rm they are in agreement. The
results of the NOx Conversion test do not indicate anything
about the condition of the SCR itself.
1. In PTT, run Operation 2549-08-03-03 NOx Conversion, located
under the Test tab.
2. While running the routine if you get new NOx sensor fault code
(Egs: P220E-93 , P220F-93), then troubleshoot that fault code.
Typically P220E-93 fault code suggests replacement of NOx1
sensor.
3. Take screenshots of the graph and sensor values approximately
2-3 minutes prior to engine shutdown. A guide to taking
screenshots can be found in THIS solution.
- Inlet and Outlet NOx values should be within 40 parts per
million (ppm) of one another just before the engine shuts down.
Shown below is an example of how a graph with two properly
functioning sensors will look:
; Live UI
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4. If no issues are found with the sensor readings from the NOx
Conversion review, the sensors are not the source of the
conditions causing the codes to log. Further diagnostic steps of
other components will need to be performed to determine the
cause of the faults.
5. If this solution is being reviewed for P20EE, P207F, P225E or
P103C, the DEF Dosing Valve Solution for the same DTCs should be
reviewed for further information.
6. If diagnostic steps do not locate a root cause for the code(s),
open an eService case with Dealer Technical Support
- The screenshot(s) taken of the NOx conversion screen prior to
engine shutdown (as shown in the screenshot above) should be
attached to the case.
- A complete summary of all tests performed along
with numeric measurements, a DTC Readout, and any
information concerning previous visits and parts replaced must
be included when the case is opened.
• "Ok", "Good" and "Followed GD" are not acceptable
descriptions of tests performed and test results.
- Add the solution numbers for all CBR articles followed.
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Tags
k15560422
p225e-00
p2201-64
p220164
p221a-00
p221a00
p225c-00
p225c00
p225e00
Related links and attachments
KC-104
KC-908
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