K51683834

Solution K51683834
Tuesday, February 6, 2018 8:58:47 PM CET
Solution
Title (customer effect)
Volvo Chassis - Diagnostic Trouble Code ( DTC ) P0128, Diagnostic And Repair US14+OBD13 (Commonly Year Model 2015) And Newer
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:
For US14+OBD13 Chassis With A D11 Engine
- Refer to Tech Tip TT-002-2015.
For US14+OBD13 Chassis With A D13 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 ).
• 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 OBD15 (Commonly Year Model 2016) Chassis ONLY:
- Software improvements have been released to address this code. If P0128
is present, software should be checked and updated as necessary.
- Two modules are affected by this update and should be reprogrammed in the
following order:
1. Engine Control Module ( EMS )
2. Aftertreatment Control Module ( ACM )
- If there are other codes and symtoms present or the code(s) return following the
software update, normal diagnostic procedures should be followed to determine the
issue.
For 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 ).
• 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
Solution visibility
Dealer distribution
Function(s)/component(s) affected
Function affected
engine , cooling , thermostat , Diagnostic tool
Function Group
Function Group
262 coolant pump and thermostat
Customer effect
Main customer effect
calibration/programming/pairing/missing operation , diagnostics/methodology , fault
code/display
Fluid implicated
Lights/Messages on
information display
coolant
LEDs
Administration
Author
a175606
Last modified by
RU4469V
Creation date
06-04-2016 16:04
Date of last update
10-01-2018 22:01
Status
Published
NA_VOLVO_Vehicle_Range
NA_VOLVO_Vehicle_Ra
nge
Conventional , VNL , VNM , VHD , VAH
Engine family
Engine family
Volvo , 11L Engine
Emission Standard
Emission Standard
US15