NHTSA ID Number: 10189917
Manufacturer Communication Number: KC-2052
TSB/Document Date: 2021-04-06
Summary
Volvo
Check Fuel Filter – Instrument Cluster Warning Message - US20 Emissions And Newer
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TSB/Document ID: KC-2052
Replacement Service Bulletin Number:
MFR Communication Date: 2021-03-24
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
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Content creation stages KC-2052
Volvo Check Fuel Filter – Instrument Cluster
Warning Message - US20 Emissions And Newer
a
Beginning with US17+OBD20 and US21+OBD20 emissions (Emissions level depends on the
engine installed), vehicles built with Volvo engines have been equipped with a dedicated supply fuel
pressure sensor. The pressure sensor is used to continually monitor the fuel supply pressure and
provide early warning detection of low fuel supply pressure or filter restriction. The engine control
module (EMS) monitors the pressure sensor values and activates a warning message in the
instrument cluster (IC) when the supply pressure values are below the calibrated limit. It is
necessary to have the correct software for the EMS and IC to enable this early warning detection.
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IMPORTANT
Any potential root cause for a decrease in supply fuel pressure will activate the warning message.
a
The warning message does not automatically indicate fuel filter(s) are the only component that nee
ds to be investigated for the decrease in supply fuel pressure.
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Example of message:
a
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Applicable Vehicles with a Main software (MSW) Part Number listed below or newer for the
EMS and IC will have the early warning fuel filter restriction message enabled.
(Excluding EMS MSW# 23820138 & 23841271)
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IC MSW Part #
23752214
a
Engine
11L VGT
13L VGT
13L TC
EMS MSW Part #
23783118
23783118
23783119
a
a
Description of functionality: aHow and when warning
messageawill
appear.
UI
; Live
a
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Once per drive cycle
a
If low supply fuel pressure is detected, the warning message will appear in the instrument cluster
display. It will remain in the “Pop-up Notices” screen in the instrument cluster display for the
remainder of that drive cycle.
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Goes away after key off
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On the next drive cycle, the warning message will no longer be displayed (unless the low supply
fuel pressure is detected again).
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Warning message history can be viewed in Tech Tool
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Tech Tool Operation ID 2300-08-03-02 Fuel Pressure. See the section below for more detailed
information.
a
P008A Low Pressure Fuel System Pressure - Too Low:
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The functionality remains unchanged for model year 2021 and still has an associated MIL lamp.
a
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Diagnosing Vehicles with Warning Message
Warning message history can be viewed in Tech Tool
a
Tech Tool Operation ID 2300-08-03-02 Fuel Pressure, in Tech Tool SW version 2.7.115 and later,
enables new functionality related to the warning message. Warning message history, as well as live
supply fuel pressure data, are available in this operation. See section below for more detailed
information.
a
Warning message has no corresponding DTC
a
The fuel filter warning message is not triggered by a DTC. Instead, parameters are transmitted by
the EMS for the instrument cluster to display the warning message. Below are new parameters
related to supply fuel pressure that can be viewed in Tech Tool Operation ID 2300-08-03-02 Fuel
Pressure.
a
Param
Description
eter
P1WE
Fuel System, Fuel Filter Clogging Symptom Detected, Status
R
P1WE
Fuel System, Latest Clogged Fuel Filter Symptom Detected, Timestamp
S
P1WE
Number of warning events since last EMS SW update
M
P1WE
The first time since last EMS SW update that the warning was set
; Live UI
G
https://volvo-trkna-prod1.pegacloud.net/prweb/PRAuth/app/VolvoKM_/iNPUIKpeinqPJi2G0hH930k43USdE1gb*/!TABTHREAD12?pyActivity=%40base…
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P1F24
Content creation stages KC-2052
Supply Fuel Pressure (gauge)
a
Parameters/Warning Status cannot be cleared like a DTC
a
The warning message status parameters listed above (P1WER, P1WES, P1WEM, P1WEG) cannot
be erased/reset with a DTC clear. The only way to reset them is with an EMS SW update. However,
P1WER can be “healed” (see below).
a
Warning Message Status (P1WER) takes 5 drive cycles to “heal”
a
The warning message status parameter P1WER, can “heal” and reset its status back to inactive.
This will occur if 5 drive cycles are completed with no warning message/low pressure symptoms
being detected.
a
Warning Message relationship with P008A, P20DC, P0087, P228F, P016F, P1036
a
The fuel filter warning message diagnostic is designed to be an early warning so the driver can
bring the vehicle in for filter replacement before more severe fuel system low pressure or high fuel
pressure DTCs occur. However, it is possible for a vehicle to have an active fuel filter warning status
and other fuel system DTCs active.
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Further information
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Fuel ţlterahousing components
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PTT screen foraOperation 2300-08-03-02 Fuel Pressure
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Tags
check fuel ţlter
supply pressure
UI
; Live
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Content creation stages KC-2052
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