SP18-35H

SP18-35H
Special Bulletin
Date
Expiration
11.2018
Revision: H
Procedure updated
Release
Page
9
1(12)
11/04/2021
P20EE (diagnostic troubleshooting code) SOLUTION - NOX CONVERSION EFFICIENCY
Prevost vehicles
B13R (9700 us/can)
MODEL YEAR(S) AND VEHICLES INVOLVED
NOTICE TO SERVICE CENTERS
Verify vehicle eligibility by checking warranty bulletin status with SAP or via ONLINE WARRANTY SYSTEM
available on Service / Warranty tab of Prevost website.
H3-41, H3-45 coaches
GHG17 or OBD18 compliant vehicles
Model Year: 2017 - 2019
From 2PCH33494HC713735 up to 2PCH33492KC710467 (not incl.)
H3-45 VIP motorhomes
GHG17 or OBD18 compliant vehicles
Model Year: 2017 - 2019
From 2PCVS3493HC713747 up to 2PCVS3491KC720591 (not incl.)
X3-45 coaches
GHG17 or OBD18 compliant vehicles
Model Year: 2017 - 2019
From 4RKG33491H9737417 up to 4RKG33490K9737576 (not incl.)
X3-45 coaches
GHG17 or OBD18 compliant vehicles
Model Year: 2017 - 2019
From 2PCG33490HC736182 up to 2PCG33494KC736404 (not incl.)
X3-45 VIP commercial use
Model Year: 2017 - 2019
GHG17 or OBD18 compliant vehicles
X3-45 VIP motorhomes
From 2PCCS3495HC736180 up to 2PCBS3491KC736437 (not incl.)
Model Year: 2017 - 2019
VOLVO 9700
Model Year: 2017 - 2019
Writer: EL
GHG17 or OBD18 compliant vehicles
From 3CET2V927H5184392 up to 3CET2V926K5194709 incl.

SP18-35H
Special Bulletin
Date
Expiration
Release
Page
9
2(12)
11.2018
DESCRIPTION
For the vehicles on which a notification for SP18-35 exists, perform the following checklist and operations. It
has been determined that these vehicles had the code (DTC) P20EE activated.
DO NOT perform this special bulletin on a specific vehicle unless a notification exists, otherwise, no
reimbursement will be awarded.
You can request a vehicle to be notified, to do so, send a request to the Technical Publications functional
mailbox: [email protected] and include a screen capture of diagnostic troubleshooting code
P20EE.
MATERIAL
Part required
Part No.
Description
Qty
22677399
GASKET, DEF INJECTION NOZZLE
1
21376801
SEALING PLATE
1
22677399
21376801
NOTE
Material can be obtained through regular channels.
Other parts that may be required. Note that these parts are not covered by this bulletin.
Part No.
Description
Qty
22303390
NOx SENSOR, PRE
1
22303391
NOx SENSOR, POST
1
Writer: EL

SP18-35H
Special Bulletin
Date
11.2018
Expiration
Release
Page
9
3(12)
DANGER
Park vehicle safely, apply parking brake, stop the engine. Prior to working on the vehicle, set the
ignition switch to the OFF position and trip the main circuit breakers equipped with a trip button. On
Commuter type vehicles, set the battery master switch (master cut-out) to the OFF position.
IMPORTANT NOTES
DO NOT perform WB18-04 or WB18-84 EMS & ACM SOFTWARE UPDATE before the
following checklist, otherwise useful diagnostic codes and monitor data could be erased.
Wb18-04 for Prevost coaches, Wb18-84 for Volvo 9700
Any troubleshooting labor of active DTCs (Diagnostic Troubleshooting Codes) other than
P20EE is considered as a separate operation of the RO (repair order) and cannot be charged
to this special bulletin.
Perform the steps in the same order as they appear. If this recommendation is not followed,
required diagnostic information might not be recoverable after the software update.
Writer: EL

SP18-35H
Special Bulletin
Date
Expiration
11.2018
Release
Page
9
4(12)
Vehicle identification
H3
X3
9700



V.I.N (short) : __ ̶ __ __ __ __
OPERATIONS TO BE PERFORMED IN ADVANCE BY THE SERVICE ADVISOR
Ask the customer whether he/she noticed an abnormal consumption of oil or coolant.
Search all relevant information concerning the aftertreatment system or severe turbo failure in the history of
repairs of the vehicle and record. Attach to the repair order.
Also check if SP18-35 has already been performed on that particular coach. If this is the case, do not perform
SP18-35 once again, contact the Technical Publications for instructions. You can send a message to the
Technical Publications functional mailbox: [email protected]
NOTE/RESULTS:
Writer: EL

SP18-35H
Special Bulletin
Date
Expiration
Release
Page
9
5(12)
11.2018
#
checklist
1
Before performing any engine ECM software update, connect PTT and check the diagnostic
codes related to EMS and ACM.
INITIALS
& DATE
Confirm that code P20EE is present (whether active or inactive). Take a screen capture of the
DTCs and save for submittal.
Is the code P20EE present? YES 
NO
COMMENTS/RESULTS:
2
Before performing any engine ECM software update, take a screen capture of the five most
recent SCR efficiency evaluations and save for submittal.
•
Test screen 2589‐08‐03‐05 on PTT with software version prior to 2.8
•
Operation 25846-3 option D on PTT with newest software version (see next
image)
OPERATION 25846-3 OPTION D ON PTT WITH NEWEST SOFTWARE VERSION
Writer: EL

SP18-35H
Special Bulletin
Date
Expiration
11.2018
Release
Page
9
6(12)
Example of SCR efficiency evaluations
COMMENTS/RESULTS:
3
Check if there are leaks at the Charge Air Cooler (soapy water test). Check if there are leaks of
EGR, exhaust gas (between turbo and SCR converter). Note any presence of soot. Any repair is
considered as a separate operation of the RO (repair order) and cannot be charged to this special
bulletin.
Note: Try to clear exhaust clamps while keeping in mind the state of the insulating blankets
to avoid damages because the heat can make them fragile over time.
Leaks were found? YES
NO
COMMENTS/RESULTS:
4
Check and record the engine ECU (a.k.a. Engine Control Module ECM) software number.
To do so, check in the dashboard DID. Select DIAGNOSTICS > PART NUMBER > ENGINE ECU
Engine ECU software number: ___________________________
COMMENTS/RESULTS:
5
Engine ECU (a.k.a. Engine Control Module ECM) software update.
Writer: EL

SP18-35H
Special Bulletin
Date
Expiration
11.2018
Release
Page
9
7(12)
If the engine ECU software is not up to date, perform an update to the latest version (software
version should be 23766686 or higher).
COMMENTS/RESULTS:
6
Remove DEF doser, perform the dosing test (operation 25846-3 option B) and record the results
below.
Expected values: small dosing: 49 - 60 ml
large dosing: 196 - 240 ml
Dosing amount: small________ ml
large _________ ml
COMMENTS/RESULTS:
7
Test the concentration of DEF and record the result below. Tool: refractometer # 88890105.
Is the DEF of proper concentration?
Writer: EL
YES 
NO

SP18-35H
Special Bulletin
Date
COMMENTS/RESULTS:
8
Expiration
Release
Page
9
8(12)
11.2018
Check inside the pipe downstream of the DEF injector for any accumulation of solid (crystallized)
DEF, attach pictures of crystal accumulations if applicable. Reinstall the DEF injector with two new
seals.
NOTE: A small amount of crystal accumulation is normal.
Is there significant/excessive DEF crystal buildup?
YES 
NO
COMMENTS/RESULTS:
Writer: EL

SP18-35H
Special Bulletin
Date
Expiration
11.2018
9
Release
Page
9
9(12)
Perform the Exhaust aftertreatment system analysis (operation 25065-3)
Take a screen capture of the Test result (image below) and save for submittal.
COMMENTS/RESULTS:
Writer: EL

SP18-35H
Special Bulletin
Date
Expiration
Release
Page
9
10(12)
11.2018
10
Authorization for the replacement of the SCR converter
An analysis of this checklist with the comments/results must be done in order to allow the
replacement of the SCR converter.
Scan and send this checklist with all the relevant documents, screen captures, etc. to the
Technical Publications functional mailbox: [email protected]
Please indicate in the “subject line”: SP18-35 and the short V.I.N.
below…
as
in
the
example
COMMENTS/RESULTS:
Writer: EL

SP18-35H
Special Bulletin
Date
Expiration
11.2018
Release
Page
9
11(12)
PARTS / WASTE DISPOSAL
Discard waste according to applicable environmental regulations (Municipal/State [Prov.]/ Federal)
WARRANTY
This diagnostic is covered by Prevost’s normal warranty. We will reimburse you the parts and labor upon receipt
of a warranty claim according to the following:
PARTS COVERED BY THIS BULLETIN
22677399
DEF injection nozzle gasket
Qty: 1
21376801
sealing plate
Qty: 1
Any other parts such as parts installed to correct exhaust leaks or for the replacement of sensors cannot
be charged to this bulletin. These are covered by the normal warranty when applicable and must be
charged on a different operation.
LABOR COVERED BY THIS BULLETIN
The time allowed to complete this bulletin in its entirety is 2.25 hours
This allowed time covers the execution of the procedure described in this document only. Any corrective
work such as replacing the DEF injector, correcting exhaust leaks or any diagnostic work of active DTCs
codes other than P20EE is considered a separate operation on the repair order and cannot be charged
to this special bulletin.
Please submit claim via our Online Warranty System, available at www.prevostcar.com (under Service \
Warranty section). Use Claim Type: “Bulletin/Recall” and select ‘’Warranty Bulletin SP18-35 ".
Writer: EL

SP18-35H
Special Bulletin
Date
11.2018
OTHER
VBC Bulletin
N/A
Fail Code
04.04-1
Defect Code
9
Syst. Cond
B
Causal Part
21970125
Expiration
Release
Page
9
12(12)
Access all our Service Bulletins on
http://techpub.prevostcar.com/en/
or scan the QR-Code with your smart phone.
Prevost engages in a continuous program of testing and evaluating to provide the best possible product. Prevost, however, is not committed
to, or liable for updating existing products.
Writer: EL