NHTSA ID Number: 11020229
Manufacturer Communication Number: TSB250042
TSB/Document Date: 2025-07-07
Summary
This Technical Service Bulletin describes the verification and resolution steps for the OEM ignition control module relay which may be oriented in a way that allows water to enter the relay connection, resulting in a crank no start event or fault code 6631 (Engine Ignition Control Module #1 - Abnormal Update Rate). This is an update to a previously submitted communication.
Technical Service Bulletin
Technical Service Bulletin: TSB250042
Released Date: 26-Jun-2025
OEM Ignition Control Module and Ignition Coil/Oxygen Sensor Relays Water Intrusion for Kenworth
™ and Peterbilt™ Trucks: Fault Codes 459, 465, 2682, 3431,
5111, 6631, 6927, 11243, 12115, 12117, 12119, 12122, 12124, 12126
OEM Ignition Control Module and Ignition Coil/Oxygen Sensor Relays Water Intrusion for
Kenworth™ and Peterbilt™ Trucks: Fault Codes 459, 465, 2682, 3431, 5111, 6631, 6927,
11243, 12115, 12117, 12119, 12122, 12124, 12126
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.
Information Only - OEM Related Matter Not Covered By Cummins® - Contact Appropriate OEM Dealer or OEM Representative For Additional Information
Contents
Product Affected
Engine:
X15N CM2380 X150B
Original Equipment Manufacturer (OEM):
Peterbilt
Kenworth
Issue Summary
Symptom:
Crank No Start
Fault Codes:
459
465
2682
3431
5111
6631
6927
11243
12115
12117
12119
12122
12124
12126
Root Cause:
OEM ignition control module relay orientation allowing water to enter relay connection
OEM ignition coil/oxygen sensor relay orientation allowing water to enter relay connection
Verification
Visually inspect the orientation of the OEM ignition control module relay. OEM ignition control module relay orientation on some units allows water to enter the relay
connection and cause a malfunction.
Figure 1, OEM Ignition Control Module Relay Orientation Susceptible to Water Intrusion.
Resolution
The orientation of the ignition control module relay should not allow water intrusion on the wiring harness connector. See equipment manufacturer service information
for relay reuse guidelines.
Figure 2, Acceptable OEM Ignition Control Module Relay Orientation to Prevent Water Intrusion.
Document History
Date
Details
2025-2-20
Module Created
2025-6-10
Updated title, fault code list, and added second bullet to Root Cause.
2025-6-26
Corrected typo of fault code 12117 in symptom section of TSB.
Last Modified: 26-Jun-2025
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TSB/Document ID: TSB250042
Replacement Service Bulletin Number:
MFR Communication Date: 2025-06-26
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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