3/25/25, 2:31 PM

Emission Service Bulletin

43-080 - DEF Lamp Operation
3/25/2025

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43-080

DEF Lamp Operation

Section
Inlet/Exhaust/Aftertreatment - 43

Subject
DEF Lamp Operation

Whats New Abstract
As of 03/25/2025, this campaign has resumed.
Software updates are now available to complete this campaign.
Campaign start date: 10/22/2024

Revision
03/25/2025: Campaign has resumed. Software updates are now available to complete this campaign. 39 VINs added to chassis list. Population changed
from 84,239 to 84,278. Digital Display and VECU software update procedure has been updated.
12/19/2024: Population changed from 85,119 to 84,239. Chassis removed from list that were not affected by issue.
12/13/2024: Campaign temporarily suspended.

Condition
The Diesel Exhaust Fluid (DEF) lamp, in certain instances, may not flash, may not illuminate red, and can be delayed by 30 seconds. This issue may cause
inaccurate digital gauge notifications of the DEF system and may cause the Check Engine Lamp to illuminate. Normally the DEF lamp would be illuminated
solid white when there are no issues with the DEF system and illuminate solid red or flashing red when there are issues with the DEF system.
Campaign start date: 10/22/2024
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Chassis Affected
84,278 (75,466 US and 8,812 Canada) model year 2021-2025, 365, 367, 389, 520, 535, 536, 537, 548, 567, 579, and 589 chassis equipped with a 7" or 15"
Digital Display and VMUX 22.5/23 software.

Action
Campaign
Service all chassis affected that enter your dealership, even if the customer has no issue with the chassis.
1. Review the attached chassis list for your dealer code and schedule your customer(s) for service if their chassis is on the list.
2. In Service Management, select campaign 43080 to add it to the case. If the unit is released back into service without performing the repair, make
sure to also release the campaign in Service Management.
3. If you are not using Service Management to start repair orders, review SIR for “Complete” next to the 43080 campaign code prior to performing this
repair.
4. Follow procedures to update the VECU and/or Digital Display software.

Warranty
Starting on 10/22/2024 - There is no time or mileage limit for this campaign. Peterbilt will pay for labor:
0.5 hours labor to process a file through PACCAR Vehicle Pro (PVP) and update the Digital Display and VECU. Use Recommended Repair 43080A.
0.4 hours labor to process a file through PVP, verify software level in Digital Display and VECU, and update either the Digital Display OR
VECU software (if only one module requires a software update). Use Recommended Repair 43080B.
0.3 hours labor to process a file through PVP, verify software level in Digital Display and VECU. (Both Digital Display and VECU are found to be at the
most current software level). Use Recommended Repair 43080C.
For any supplemental repairs, file a long form claim and input (43080) in the “Campaign Code” field.
File the claim within 7 days in accordance with Warranty Policy.
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Cross-division repairs are not allowed for this campaign.
Take-Off Parts Disposition : N/A

PRWS CLAIM CODING​​
​ ampaign
C
​Campaign
​43080
Code:
Type:

F​ ield
Repair

​ laim
C
​Truck
Category:

​Repair Type: ​Proactive

​ ustomer
C
Concern ​029
Code:

​Causal Code: ​95

​ orrective
C
Action
​23
Code:

​ esponsibility
R
​Camp
Code:

​003Failure
002Location:
024

​Causal Part:

S​ upplier
Code:

​N/A

​SRT Code:

​ 43-6090Q
100-100
​ 23-006
B
0.5 hours
Perform
software
update
(Digital
Display
and VECU)
per 43-080
bulletin
procedure.
B23-20B
0.4 hours
Process
PVP file
and

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program
Digital
Display OR
VECU (one
module is
already
current)
B23-20C
0.3 hours
Process
PVP file
and verify
software
for Digital
DIsplay
and VECU
(both
modules
already
current).

Parts
Software only, no parts necessary.

Procedure
Please follow your dealership's safety procedures and precautions to ensure the vehicle can be safely repaired and maintained.
1. Follow steps in Digital Display and VECU software update procedure.

Attachments
43-080 - Chassis List
43-080 - Digital Display and VECU software update procedure
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CUSTOMER LETTERS
43-080 - English Customer Letter
43-080 - French Customer Letter
43-080 - Spanish Customer Letter

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