NHTSA ID Number: 11027455
Manufacturer Communication Number: 2077982/2
TSB/Document Date: 2026-01-08
Summary
Exhaust Flap Control Unit - Various DTCs | Bentayga Series | 17-25MY. Condition: Warning lamp illuminated within the Driver Instrument Panel (DIP) “Drive system fault. Contact your Bentley dealer”
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TSB/Document ID: 2077982/2
Replacement Service Bulletin Number:
MFR Communication Date: 2025-12-11
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Technical Service Bulletin
Topic
Exhaust Flap Control Unit - Various DTCs | Bentayga Series | 17-25MY
Market area
Bentley: worldwide (2WBE),China 796 VW Import Comp. Ltd (Vico), Beijing (6796)
Brand
Bentley
Transaction No. 2077982/2
Level
EH
Status
Released for publishing
Release date
Dec 10, 2025
Diagnostic trouble codes
Fault
symptom
Storage
state
Diagnostic trouble code
0001 - Engine
electronics
P049F00: Exhaust Pressure Control Valve "B"
Intermittent
0001 - Engine
electronics
P14AB00: Exhaust door control unit mechanical
malfunction
static
0011 - Engine
electronics 2
P04A000: Exhaust Pressure Control Valve "B" Range
/Performance
static
0001 - Engine
electronics
P04A000: Exhaust Pressure Control Valve "B" Range
/Performance
static
0011 - Engine
electronics 2
P14AB00: Exhaust door control unit mechanical
malfunction
Intermittent
0001 - Engine
electronics
P14AB00: Exhaust door control unit mechanical
malfunction
Intermittent
0011 - Engine
electronics 2
P04A000: Exhaust Pressure Control Valve "B" Range
/Performance
Intermittent
0011 - Engine
electronics 2
P14AB00: Exhaust door control unit mechanical
malfunction
static
0001 - Engine
electronics
P049F00: Exhaust Pressure Control Valve "B"
static
0001 - Engine
electronics
P04A000: Exhaust Pressure Control Valve "B" Range
/Performance
Intermittent
0011 - Engine
electronics 2
P049F00: Exhaust Pressure Control Valve "B"
Intermittent
0011 - Engine
electronics 2
P049F00: Exhaust Pressure Control Valve "B"
static
el
y
Diagnostic address
New customer code
Object of complaint
Complaint type
information, navigation, communication, entertainment -> malfunction display
symbols -> emissions control system malfunction display
functionality ->
activates
entire vehicle -> vehicle areas -> vehicle rear
noises,
vibrations ->
noise
> no
instruction
<
entire vehicle -> vehicle areas -> vehicle rear
noises,
vibrations ->
too loud
> no
instruction
<
Vehicle data
Bentayga Series
Sales types
Type MY
Brand Designation Engine code Gearbox code Final drive code
4V1* 2017 E
*
*
*
4V1* 2018 E
*
*
*
4V1* 2019 E
*
*
*
4V1* 2020 E
*
*
*
4V1* 2021 E
*
*
*
4V1* 2022 E
*
*
*
4V1* 2023 E
*
*
*
4V1* 2024 E
*
*
*
4V1* 2025 E
*
*
*
4V1* 2026 E
*
*
*
ZV1* 2023 E
*
*
*
ZV1* 2024 E
*
*
*
ZV1* 2025 E
*
*
*
Documents
Document name
master.xml
Position
Technical Service Bulletin
Exhaust Flap Control Unit - Various DTCs | Bentayga Series | 17-25MY
Transaction No.: 2077982/2
Release date: Dec 10, 2025
Condition
Warning lamp illuminated within the Driver Instrument Panel (DIP)
“Drive system fault. Contact your Bentley dealer” (Figure 1)
Figure 1
Warranty claims for a road test will not be approved please see the Notice (Below Figure 3)
One or more of the following Diagnostic Trouble Codes (DTC’s) are stored within Engine Control Modules 1
and/or 2 (Depending on model type)
P04A000: Exhaust Pressure Control Valve “B”
P04A000 / P047500: Exhaust Pressure Control Valve “A”
P14AB00: Exhaust door control unit mechanical malfunction
P049F00: Exhaust Pressure Control Valve "B”
Technical Background
The root cause of Exhaust Flap Control Unit malfunction is electrical ‘shorting’ of the commutator segments,
this is caused by an accumulation of “Sludge” within the exhaust flap control unit
DTC’s are stored when the respective Control Unit does not move through its full range of motion
Production Solution
Not applicable
Service
CAUTION: Ensure the exhaust system has fully cooled prior to working on or around it.
Using the DTC information, conduct a visual inspection of the relative Exhaust Flap Control Unit wiring
harness and connector contacts
Carry out an ignition cycle whilst monitoring the operation of the left and right hand Exhaust Flaps, check for
any operating issues
If an Exhaust Flap is stuck in an open, closed, partially closed position or does not achieve a full range of
motion continue to follow the instructions within this Technical Product Information (TPI) document - Figure 2
Do not monitor the position of the Exhaust Flaps whilst the engine is running
Figure 2
Remove the suspected Exhaust Flap Control Unit – Refer to Repair Group. 26 Exhaust system – Exhaust
flap control unit – To remove and fit
Check and confirm the Exhaust Flap spindle is free to open and close by hand - Figure 3
Figure 3
If no issue is evident and the Exhaust Flap oscillates freely by hand - replace the defective Exhaust Flap
Control Unit, refer to Repair Group. 26 Exhaust system - Exhaust flap control unit - To remove and fit
If the Exhaust Flap does not oscillate freely by hand – replace the exhaust system. Refer to Repair Group.
26 Exhaust system – Rear silencer and pipes – To remove and fit
IMPORTANT: If the exhaust flap does not oscillate freely by hand - RAISE A NON-TECHNICAL DISS
QUERY ENSURING THE FOLLOWING IS ATTACHED
•
Video which clearly show the issue(s)
•
Current / up to date ODIS log
NOTICE
NOTE: Do not conduct a road test to confirm if the issue is resolved
The operative should use the rotary control switch and change the mode to ‘Sport’ and then retest
TIP: Ensure the vehicle is parked in a well-ventilated area
Warranty
Warranty type 110 or 910
Damage service number 26 71 – Exhaust flat control unit
Damage service number 26 33 – Exhaust Silencer and pipes
Damage code 00 40
Bentayga Series
Exhaust flap Control unit Remove + Fit
Labour operation code 26 71 19 00
Time 10 TU
Basic settings - 01 50 00 00 as per ODIS log must not exceed 10 TU
Exhaust Silencer and Pipe Replace
Labour operation code 26 33 55 00
Time 110 TU
Note: The operative must raise a non - technical DISS query and include video of defective parts prior to part
replacement only, please quote
LOT 26 33 55 00 for traceability purposes.
NOTICE
Warranty claims for a road test will not be approved
Required Parts and Tools
NOTICE
4N0133246A - For the latest part information always refer to the Electronic Parts Catalogue (ETKA)
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