TSB200189-092120

9/29/2020
Diagnostics for Failed Urea Quality Sensor Root Cause for PACCAR Chassis
Technical Service Bulletin
Technical Service Bulletin: TSB200189
Released Date: 21-Sep-2020
Diagnostics for Failed Urea Quality Sensor Root Cause for PACCAR Chassis
Diagnostics for Failed Urea Quality Sensor Root Cause for PACCAR
Chassis
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:
B6.7 CM2350 B121B
L9 CM2350 L116B
X12 CM2350 X119B
X15 CM2350 X114B
X15 CM2350 X116B
Issue
Diesel exhaust fluid (DEF) header assembly related fault codes, causing DEF urea quality sensor malfunctions. See fault codes
listed below.
Symptoms:
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9/29/2020
Diagnostics for Failed Urea Quality Sensor Root Cause for PACCAR Chassis
1669 Aftertreatment Diesel Exhaust Fluid Tank Level Sensor Circuit - Voltage Above Normal or Shorted to High Source
1685 Aftertreatment Diesel Exhaust Fluid Quality Sensor Circuit - Voltage Below Normal or Shorted to Low Source
1686 Aftertreatment Diesel Exhaust Fluid Quality Sensor Circuit - Voltage Above Normal or Shorted to High Source
1713 Aftertreatment Diesel Exhaust Fluid Tank Heater - Data Valid But Above Normal Operating Range - Moderately Severe
Level
1715 Aftertreatment Diesel Exhaust Fluid Quality - Root Cause Not Known
3868 Aftertreatment Diesel Exhaust Fluid Quality - Abnormal Update Rate
4233 Aftertreatment 1 Diesel Exhaust Fluid Temperature 2 Sensor Circuit - Voltage Above Normal or Shorted to High Source
4234 Aftertreatment 1 Diesel Exhaust Fluid Temperature 2 Sensor Circuit - Voltage Below Normal or Shorted to Low Source
4572 Aftertreatment 1 Diesel Exhaust Fluid Tank Temperature - Abnormal Update Rate
4677 Aftertreatment 1 Diesel Exhaust Fluid Tank Level - Abnormal Update Rate
4739 Aftertreatment 1 Diesel Exhaust Fluid Tank Level Sensor - Root Cause Not Known
Resolution
Additional diagnostic procedure to the related DEF urea quality sensor fault codes.
Reference Service Instruction section below.
Service Instruction
Reference PACCAR TIB 43-061: Additional Diagnostics for Failed Urea Quality Sensor (UQS).
Document History
Date
2020-9-21
Details
Module Created
Last Modified: 21-Sep-2020
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