KC-2171

4/29/22, 10:10 AM
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Temperature Sensor Troubleshooting Guide US10+OBD13 And Newer
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Component Overview
The Exhaust Gas Temperature Sensors are utilized in the Exhaust
Aftertreatment System for temperature readings at specific locations in
different stages of the system. These are two-wire sensors
which corollate resistance to temperature. The sensors are commonly
referred to as T1, T2, T3 & T4 respective to their place in the exhaust
stream. T4 was added for OBD19 and newer emissions. These sensors
report to the Aftertreatment Control Module (ACM) and play an important
part in the EATS strategy and diagnostics.
The primary failure mode Temperature Sensors is internal failure.
Diagnosis and Repair
Perform a DTC Readout. Review the tables below to determine which
category the DTC currently being diagnosed falls under. Proceed
according to the directions for the appropriate section.
NOTE: Active Temperature Sensor DTCs will cause Regens to abort.
High Exhaust Temperature DTCs
DTC
Description
P1151-00
Aftertreatment System Over Temperature
P2428-00
Exhaust Gas Temperature Too High
Directions: The above DTCs commonly fault in correlation to an
upstream component failure that causes high temperature readings in the
EATS. If other system DTCs are present prioritize the system DTCs
first. If no other DTCs or upstream faults observed, proceed with the
directions below.
Exhaust Temp Plausibility DTCs
UI These codes should only be diagnosed if they are Active or have a
; Live
Note:
DTC Confirmed status of True.
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DTC
Description
Exhaust Gas Temperature Sensor Circuit
P246F-64
Range/Performance Bank 1 Sensor 4
NOTE: OBD19 & 20 Vehicle only, 1-Box SCR Follow TSB
DEF Crystallization, dosing valve, clean.
P2084-64
P2080-64
P242B-64
Exhaust Gas Temperature Sensor Circuit
Range/Performance (Bank 1 Sensor 2)
Exhaust Gas Temperature Sensor Circuit
Range/Performance Bank 1 Sensor 1
Exhaust Gas Temperature Sensor Circuit
Range/Performance (Bank 1 Sensor 3)
Directions: Confirm the Temperature Sensor Values at Ambient and/or
during a Heating Cycle (Regen). Any sensors that are out of expected
range should be replaced using the Impact operations below:
Operation
2581-03-02-05
2581-03-02-06
2581-03-02-07
Title
Exhaust Temperature Sensor, Replacement. T1
Exhaust Temperature Sensor, Replacement. T2
Exhaust Temperature Sensor, Replacement. T3
If no fault is found, ensure software is up to date on the Engine ECU
(EMS), as some diagnostics improvements have been released.
Ambient Temperature Evaluation - Using PTT 2589-08-03-02 Subtest
A, Select Soot Regeneration, DO NOT START THE ENGINE (this is a
manual condition that can be bypassed); rather use key on, engine off.
Before starting the regen using the drop down menu view temperature
sensors readings. When engine/exhaust is at ambient temperature, all
Temperature Sensors should read close (approx. within 10 Degree F) to
the same value.
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Heating Cycle Evaluation - Using PTT 2589-08-03-02 Subtest A,
perform a Soot Regen. View/graph the temperature sensors. Make sure
the values rise in the respective order shown in the graph below.
Note: PTT will abort regen for active Temp Sensor DTCs, it may be
necessary to clear DTC in order to perform the follow evaluation.
Note: PTT will provide expected value under the information tab during
the regeneration.
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Electrical DTCs - Only diagnose active and/or confirmed DTCs.
DTC
DESCRIPTION
P242A-
Exhaust Gas Temperature Sensor Bank 1 Sensor 3
15
P2031-15
Exhaust Gas Temperature Sensor Bank 1 Sensor 2
P0544-15
Exhaust Gas Temperature Sensor Bank 1 Sensor 1
P2032-00
Engine Exhaust Gas Temperature Circuit Low (Bank 1 Sensor
2)
P242C- Exhaust Gas Temperature Sensor Circuit Low (Bank 1 Sensor
00
3)
P0545-00
Exhaust Gas Temperature Short Circuit Low
P2471-00
P2470-00
Exhaust Gas Temperature Sensor Circuit High Bank 1 Sensor
4
Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor
4
Directions:
; Live UI
1 Visual inspection wiring harness for damage
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1. Visual inspection wiring harness for damage.
2. Follow PTT Diagnostic to perform harness and sensor checks.
Rules For Replacement
Warranty will only cover replacement of a temperature sensor if
one of the DTCs in Yellow sections above is present.
Standard Diagnostic Time for a Temperature Sensor 1.4 hrs.
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Tags
p1151-00
p2428-00
p246f-64
p2084-64
p2080-64
p242b-64
p0545-00
p2471-00
p2470-00
mack
p0544-15
p2032-00
volvo
KC-2171 2581-03-02-05 REDUCED
KC-2171 2581-03-02-07 REDUCED
p2031-15
p242c-00
Related links and attachments
KC-2171 2581-03-02-06 REDUCED
p242a-15
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