SP18-35F

Special Bulletin
Date

Expiration

11.2018

Revision: F

Addition to Warranty section

Release

Page

5

1(15)

09/03/2021

P20EE (diagnostic troubleshooting code) SOLUTION - NOX CONVERSION EFFICIENCY
Prevost vehicles
B13R (9700 us/can)
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.
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
Model Year: 2017 - 2019

GHG17 or OBD18 compliant vehicles

H3-45 VIP motorhomes

From 2PCH33494HC713735 up to 2PCH33492KC710467 (not incl.)

Model Year: 2017 - 2019
X3-45 coaches

GHG17 or OBD18 compliant vehicles

Model Year: 2017 - 2019

From 4RKG33491H9737417 up to 4RKG33490K9737576 (not incl.)

X3-45 coaches
Model Year: 2017 - 2019
X3-45 VIP commercial use

GHG17 or OBD18 compliant vehicles

Model Year: 2017 - 2019

From 2PCCS3495HC736180 up to 2PCCS3498KC736407 (not incl.)

X3-45 VIP motorhomes
Model Year: 2017 - 2019
VOLVO 9700
Model Year: 2017 - 2019

Writer: EL

GHG17 or OBD18 compliant vehicles
From 3CET2V927H5184392 up to 3CET2V926K5194709 incl.

SP18-35F

Special Bulletin
Date

Expiration

11.2018

MATERIAL

Release

Page

5

2(15)

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

SP18-35F

Special Bulletin
Date
11.2018

Expiration

Release

Page

5

3(15)

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.

Writer: EL

SP18-35F

Special Bulletin
Date

Expiration

11.2018

Release

Page

5

4(15)

PART 1
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: technicalpublications_prev@volvo.com
NOTE/RESULTS:

Writer: EL

SP18-35F

Special Bulletin
Date

Expiration

11.2018

Release

Page

5

5(15)

#

checklist

1

Connect PTT and check the diagnostic codes related to EMS and ACM. Take a screen capture of
the DTCs and attach to the repair order.

INITIALS
& DATE

Confirm that code P20EE is present (whether active or inactive). If P20EE is not present, do not
continue with this checklist.
Is the code P20EE present? YES 

NO

COMMENTS/RESULTS:
2

Take a screen capture of the five most recent SCR efficiency evaluations (Test screen 2589‐08‐
03‐05), attach to the repair order.
Example of SCR efficiency evaluations

Are the five most recent SCR efficiency evaluations hovering around or lower than 80%?
YES

NO

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:

Writer: EL

SP18-35F

Special Bulletin
Date

Expiration

Release

Page

5

6(15)

11.2018

4

Remove DEF doser and perform all dosing amount tests (Test screen 2589-08-03-05) and record
the results below.
Expected values: small dosing = 49 - 60 ml
large dosing = 196 - 240 ml
Dosing amount: small________ ml

large _________ ml

Are the results from the DEF dosing amount tests normal? YES

NO

COMMENTS/RESULTS:
5

Test the concentration of DEF and record the result below. Tool: refractometer # 88890105.

Is the DEF of proper concentration?

YES 

NO

COMMENTS/RESULTS:
6

Check inside the pipe downstream of the DEF injector for any accumulation of solid (crystallized)
DEF, attach pictures of crystal accumulations if applicable. Solid DEF will be removed during
PART 2 with Sulfur Regen 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

SP18-35F

Special Bulletin
Date

Expiration

11.2018

7

Release

Page

5

7(15)

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:

Writer: EL

SP18-35F

Special Bulletin
Date