TSB190215-120620

12/9/2019
Proper Troubleshooting for Misfire Fault Codes
Technical Service Bulletin
Technical Service Bulletin: TSB190215
Released Date: 06-Dec-2019
Proper Troubleshooting for Misfire Fault Codes
Proper Troubleshooting for Misfire Fault Codes
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.
Contents
Product Affected
B6.7N CM2380 B150B
ISX12N CM2380 X120B
L9N CM2380 L124B
L9N CM2380 L130B
Issue
Symptom:
Fault codes: 5914, 5895, 5896, 5897, 5898, 5899, 5911, 6413, 6425, 6426, 6427, 6428, 6429,
6431.
Root Cause:
Potential misdiagnosis during troubleshooting the following fault codes leading to replacement
of non-malfunctioning components or incorrect repair.
Verification
Verify any of the following fault codes are present:
Multiple Cylinder Misfire Fault Codes: 5914, 6413.
Single Cylinder Misfire Fault Codes: 5895, 5896, 5897, 5898, 5899, 5911, 6425, 6426,
6427, 6428, 6429, 6431.
Resolution
Fault Codes 5914 and 6413 are generic fault codes that log even during single cylinder
misfire. When either Fault Code 5914 or 6413 logs in the absence of any other single cylinder
misfire fault codes this indicates that no one cylinder has reached its individual misfire
threshold, even though all cylinders may be misfiring.
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12/9/2019
Proper Troubleshooting for Misfire Fault Codes
If only Fault Code 5914 or 6413 logs in the absence of any other single cylinder misfire fault
codes:
Troubleshoot Fault Code 5914 or 6413.
If two or more single cylinder misfire fault codes log:
Troubleshoot Fault Code 5914 or 6413 first.
If Fault Code 5914 or 6413 logs along with only one cylinder misfire fault code:
Troubleshoot that single cylinder misfire fault code first.
Publications Affected
Fault Code 5914, 5895, 5896, 5897, 5898, 5899, 5911, 6413, 6425, 6426, 6427, 6428, 6429, and
6431 Troubleshooting Trees have been revised. See the corresponding Fault Code
Troubleshooting Manual. Reference Section TF.
Document History
Date
2019-12-2
Details
Module Created
Last Modified: 06-Dec-2019
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