K24483157

Solution K24483157
Thursday, January 4, 2018 5:42:54 PM CET
Solution
Title (customer effect)
Diagnostic Trouble Codes ( DTC ) P208E And P103B Logging With Possible Derate (
SCR Inducement ) - US13 Emissions And Newer
Cause
P208E and or P103B may be generated due to the intermittent clogging of the DEF
dosing valve. Occurrence of this fault code is more common in Truck ( MY ) 2016 and
newer.
Solution
There have been reports of dealer technicians running regenerations, crystal sublimation
and NOx conversion tests to get out of inducement. PLEASE DO NOT RUN any of
them.
Instead follow Guided Diagnostics ( GD ) Operation number 2589-08-03-05 and
perform the Aftertreatment selective catalytic reduction (SCR) system Test in the order
mentioned below:
Test A: Confirms pressure build up takes place as expected (can be skipped). IF
PRESSURE IS NOT BUILT, DO NOT REPLACE DEF PUMP. Start truck wait for
10 minutes, shut off the truck and then re-test.
Test B, 2: Flow test (25% dosing for 2 minutes), use the graduated cylinder to document
the results accurately. (2cc accuracy needed)
Test B, 3: Flow test (100% dosing for 2 minutes), use the graduated cylinder to
document results accurately (2cc accuracy needed).
Test B, 4: Test designed to run P208E/P103B diagnostics. If it runs successfully the
vehicle is expected to get out of SCR inducement (derate).
Test C: This should be run to delete all timers associated with derate. This should be run
as the last step before releasing vehicle back to customer so that if the problem is not
completely fixed, he would still have 4 hours before the vehicle begins going into severe
derate.
Internal comments (BO)
Do not recommend EECU /ACM replacements for this issue.
Recommend GD along with this CBR.
If the truck has been in multiple times for this issue, recommend thorough inspection for
any clog.
NOTE: There is software containment available for US15 and US16 emissions conve
ntional chassis with this issue. US17 and newer chassis do not require containment
as the software already includes the changes covered in the containment. US13 and
US14 chassis will need to have complete diagnosis performed to find the root cause.
Solution visibility
Dealer distribution
Function(s)/component(s) affected
Function affected
exhaust , SCR , CV electronic control unit , 1 1 0 EMS , 2 1 0 ACM , Diagnostic tool
Function Group
Function Group
254 catalytic converter; exhaust emission control equipment , 2584 Dosage Valve;
Injector
Customer effect
Main customer effect
regeneration , calibration/programming/pairing/missing operation , diagnostics
/methodology , efficiency/abnormal behavior , fault code/display
Fault code(s)
OBD 2013 Diagnostic
Trouble Codes
NA_MIDs
P103B , P208E
MID 128 EMS
Conditions
Vehicle operating mode
Frequency of occurrence of
problem
when driving , when stationary
always
Administration
Author
ut0031h
Last modified by
RU4469V
Creation date
15-12-2016 17:12
Date of last update
19-12-2017 22:12
Review date
30-04-2017 00:04
Status
Published
Average score
2
Number of scores
2
NA_Author_Group
GTT
NA_MACK_Vehicle_Range
NA_MACK_Vehicle_Ran
ge
Cabover , LR , LEU , MRU , Conventional
NA_VOLVO_Vehicle_Range
NA_VOLVO_Vehicle_Ra
nge
Conventional , VNX , VNL , VNM , VHD , VAH
Engine family
Engine family
Volvo , 11L Engine , 13L Engine , 16L Engine , Mack , MP7 , MP8 , MP10
Emission Standard
Emission Standard
US17 GHG , US16 , US15 , US13 OBD , US14 GHG