K45941512

Solution K45941512
Thursday, May 3, 2018 10:22:24 PM CEST
NA_MACK_Vehicle_Range
NA_MACK_Vehicle_Ran
ge
LR , LEU , MRU , CHU , CXU , GU , TD
Engine family
Engine family
MP7 , MP8 , MP10
Emission Standard
Emission Standard
US16 , US15 , US13 OBD , US14 GHG
** SOLUTION **
Title (customer effect)
Mack Chassis - Diagnostic Trouble Code ( DTC ) P0128, Diagnostic And Repair - US14
+OBD13 US14+OBD15 And US14+OBD16, Commonly Model Year 2015 Through
2017
Cause
P0128-00 Coolant Thermostat (Coolant Temp Below Thermostat Regulating
Temperature) may log in OBD13 and newer chassis; Guided Diagnostics (GD) may
result in No Fault Found (NFF).
Solution
Verify the chassis emissions level
• Details can be found in the Product Details box on the Product tab in PTT as seen below:
Review the Detailed Status Information for the relevant code on the DTC Readout.
For US14+OBD13 Chassis With An MP7 Engine
- Refer to Tech Tip TT-002-2015.
For US14+OBD13 Chassis With An MP8 Engine
- EMS Software should be verified to be current.
- The DTC readout and customer complaint should be reviewed to ensure there are no
other codes in the EMS or symptoms reported that may be related to P0128A.
• Any other codes or symptoms should be diagnosed with normal procedures
- The code confirmation status for P0128 should show as TRUE when code details are
reviewed on the DTC Readout in Premium Tech Tool ( PTT ) as shown above.
• If the confirmed status is TRUE, proceed with diagnostic procedures as normal.
- Ensure the engine is warming up properly to verify the thermostat is not stuck
open.
- If the unit is functioning properly and there are no other symptoms, clear the
code and release the chassis.
• If the confirmed status is FALSE, no further diagnosis should be performed
and no parts should be changed. Clear the code and release the chassis.
For US14+OBD15 Chassis:
- Software improvements have been released to address this code. Refer to the table below:
For US14+OBD16 Chassis:
- EMS Software should be verified to be current.
- The DTC readout and customer complaint should be reviewed to ensure there are no
other codes in the EMS or symptoms reported that may be related to P0128A.
• Any other codes or symptoms should be diagnosed with normal procedures
- The code confirmation status for P0128 should show as TRUE when code details are
reviewed on the DTC Readout in Premium Tech Tool ( PTT ) as shown above.
• If the confirmed status is TRUE, proceed with diagnostic procedures as normal.
- Ensure the engine is warming up properly to verify the thermostat is not stuck
open.
- If the unit is functioning properly and there are no other symptoms, clear the
code and release the chassis.
• If the confirmed status is FALSE, no further diagnosis should be performed
and no parts should be changed. Clear the code and release the chassis.
Internal comments (BO)
FSB284-064
Solution visibility
Dealer distribution
Function(s)/component(s) affected
Function affected
FSB
, cooling , 1 1 0 EMS , Diagnostic tool
Function Group
Function Group
26 cooling system , 284 control system, fuel supply
Customer effect
Main customer effect
calibration/programming/pairing/missing operation , diagnostics/methodology , fault
code/display
Fluid implicated
coolant
Lights/Messages on
information display
Fault code(s)
Driver's information warning pictogram
OBD 2013 Diagnostic
P0128
Trouble Codes
Conditions
Vehicle operating mode
Frequency of occurrence of
problem
when driving , when stationary
random
Administration
Author
a175606
Last modified by
RU4469V
Creation date
06-04-2016 16:04
Date of last update
18-04-2018 17:04
Status
Published