TSB190091

10/4/21, 10:17 AM
Incorrect Pressure/Temperature Sensor: Fault Code 125, 743, 2191, 2973, 1664
Technical Service Bulletin
Technical Service Bulletin: TSB190091
Released Date: 22-Sep-2021
Incorrect Pressure/Temperature Sensor: Fault Code 125, 743, 2191, 2973, 1664
Incorrect Pressure/Temperature Sensor: Fault Code
125, 743, 2191, 2973, 1664
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
B6.7 CM2350 B121B
B6.7 CM2450 B155B
ISB6.7 CM2150 (EPA 2007)
ISB6.7 CM2250 (EPA 2010)
ISB6.7 CM2350 B101
ISC CM2150
ISC CM2250
ISL CM2150
ISL CM2250
ISL CM2350 L101
ISM CM876
ISX11.9/12 CM2250
ISX12 CM2350 X102
ISX15 CM2250
ISX15 CM2350 X101
ISX15 CM871
L9 CM2350 L116B
L9 CM2350 L119B
L9 CM2450 L126B
QSB6.7 CM2250
QSB6.7 CM2350 B105
QSL9 CM2250
QSL9 CM2350 L102
QSX15 CM2250
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Incorrect Pressure/Temperature Sensor: Fault Code 125, 743, 2191, 2973, 1664
QSX15 CM2350 X105
X12 CM2350 X119B
X12 CM2450 X137B
X15 CM2350 X114B
X15 CM2350 X116B
X15 CM2450 X124B
X15 CM2450 X134B
Issue
Symptom:
Fault Codes 125, 222, 743, 2191, 2973, 1664
Low power
White smoke
Engine misfire
Aftertreatment performance complaints
Root Cause:
Incorrect pressure/temperature sensor installed in the incorrect location on the engine.
Verification
Remove the pressure/temperature sensor in question and verify pressure/temperature sensor
part number.
View pressure/temperature sensor values in a key on engine off condition using INSITE®
electronic service tool or equivalent, an incorrect pressure/temperature sensor can give an
incorrect value.
At key ON engine off, the barometric air pressure should read the local barometric air
pressure, and the intake manifold pressure should read 0.0 in-hg.
Resolution
Refer to QuickServe Online parts catalog on to determine the correct sensor to use in the correct
location for a given engine.
Install correct pressure/temperature sensor. See Table 1 below for part numbers.
Table 1, Sensor Part Number and Application
Part Number
2897332
Pressure Sensing
Rangemm- hg [ inhg ]
Application
Alternate Part
Numbers
330 mm-hg [ 13 inhg ] to 838 mm-hg [
33 in-hg ]
Barometric air
pressure and/or
turbocharger
compressor intake
pressure
4921850
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10/4/21, 10:17 AM
Incorrect Pressure/Temperature Sensor: Fault Code 125, 743, 2191, 2973, 1664
Table 1, Sensor Part Number and Application
Part Number
Pressure Sensing
Rangemm- hg [ inhg ]
Application
Alternate Part
Numbers
2897333
330 mm-hg [ 13 inhg ] to 1574.8 mm-hg
[ 62 in-hg ]
Intake manifold
pressure on 6.7L or
smaller engines
4921322
2897334
330 mm-hg [ 13 inhg ] to 3810 mm-hg [
150 in-hg ]
Intake manifold
pressure on 8.3L or
larger engines
4921324, 2872784
Part Identification
Pressure/temperature sensor part number is located on underside of pressure/temperature
sensor body.
Pressure/temperature sensor must be removed to verify part number. See Figure 1 for part
number location. See Figure 2 for pressure/temperature sensor similarity examples.
Figure 1, Pressure/Temperature Sensor Part Number Location.
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Incorrect Pressure/Temperature Sensor: Fault Code 125, 743, 2191, 2973, 1664
Figure 2, Pressure/Temperature Sensor Similarity Example.
Document History
Date
Details
2019-6-5
Module Created
2019-12-20
Non-Product Problem Solving (PPS)
2021-9-20
Updated Product Affected. Added Fault Code 743.
Last Modified: 22-Sep-2021
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