Solution K27690302
Tuesday, February 6, 2018 8:53:57 PM CET

Solution
Title (customer effect)

Volvo Chassis - Diagnostic Trouble Code ( DTC ) P226C Intermittently Lighting The
Malfunction Indicator Lamp ( MIL ) - OBD15 And OBD16 Conventional Chassis

Cause

OBD15 and OBD16 chassis may intermittently log DTC P226C.

Solution

Overview
OBD15 and OBD16 conventional chassis may log DTC P226C during operation. The
diagnostic process that this DTC sets for is the monitor of boost pressure change under
sudden changes in engine load. The code is likely to set intermittently and it may be
difficult or not possible to duplicate during diagnosis. Guided Diagnostics may result in
No Fault Found (NFF). This issue is more likely to be observed in chassis with a 13L
engine and a lower power rating, and chassis with dual torque engine ratings. This code
will not affect performance or driveability.

Repair
Verify the chassis emissions level
• Details can be found in the Product Details box on the Product tab in PTT as seen
below:

For OBD15 (Commonly Year Model 2016) Chassis ONLY:
- Software improvements have been released to address this code. If P226C
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 P226C
- Any other codes or symptoms should be diagnosed with normal procedures
- If P226C is the only relevant code present and there are no symptoms to
indicate an existing problem do not replace any components.
• Code should be cleared and chassis released. This condition will be
addressed in a future software release.
EMS Software Levels (MSW) Affected:
- OBD2015 (Truck MY 2016): 22741784.P01 or older software
- OBD2016 (Truck MY 2017): 22898389.P01 or older software
Internal comments (FO)

( FO ) Please refer to this additional related information: SP 284 - 065, XE Package,
Mass Base Variable Torque Option, by clicking here.

Solution visibility

Dealer distribution

Function(s)/component(s) affected
Function affected

Turbocharger , 1 1 0 EMS , MID 128 – EMS , EECU , Diagnostic tool

Function Group
Function Group

255 turbocharger , 2841 Electronic Control Unit

Customer effect
Main customer effect

calibration/programming/pairing/missing operation , diagnostics/methodology , fault
code/display

Fault code(s)
OBD 2013 Diagnostic
Trouble Codes

P226C

Conditions
Vehicle operating mode
Frequency of occurrence of
problem

when driving , when stationary
random

Administration
Author

ut01793

Last modified by

RU4469V

Creation date

23-06-2016 19:06

Date of last update

10-01-2018 17:01

Status

Published

NA_VOLVO_Vehicle_Range
NA_VOLVO_Vehicle_Ra
nge

Conventional , VNX , VNL , VNM , VHD , VAH

Engine family
Engine family

Volvo , 13L Engine

Emission Standard
Emission Standard

US16 , US15