Technical Service Bulletin
Topic
Market area
Brand
Transaction No.
Level
Status
Release date

Exhaust Flap Control Unit - Various DTCs | Bentayga Series | 17-25MY
Bentley: worldwide (2WBE),China 796 VW Import Comp. Ltd (Vico), Beijing (6796)
Bentley
2077982/1
EH
Released for publishing
Jun 5, 2025

Diagnostic trouble codes
Diagnostic address
0011 - Engine electronics 2
0011 - Engine electronics 2
0001 - Engine electronics
0001 - Engine electronics
0011 - Engine electronics 2
0011 - Engine electronics 2
0011 - Engine electronics 2
0011 - Engine electronics 2
0001 - Engine electronics
0001 - Engine electronics
0001 - Engine electronics
0001 - Engine electronics

Diagnostic trouble code
Fault symptom
P049F00: Exhaust Pressure Control Valve "B"
P049F00: Exhaust Pressure Control Valve "B"
P04A000: Exhaust Pressure Control Valve "B" Range/Performance
P04A000: Exhaust Pressure Control Valve "B" Range/Performance
P04A000: Exhaust Pressure Control Valve "B" Range/Performance
P04A000: Exhaust Pressure Control Valve "B" Range/Performance
P14AB00: Exhaust door control unit mechanical malfunction
P14AB00: Exhaust door control unit mechanical malfunction
P14AB00: Exhaust door control unit mechanical malfunction
P14AB00: Exhaust door control unit mechanical malfunction
P049F00: Exhaust Pressure Control Valve "B"
P049F00: Exhaust Pressure Control Valve "B"

Storage state
Intermittent
static
Intermittent
static
Intermittent
static
Intermittent
static
static
Intermittent
Intermittent
static

New customer code
Object of complaint
entire vehicle -> vehicle areas -> vehicle rear
information, navigation, communication, entertainment -> malfunction display symbols -> emissions
control system malfunction display
entire vehicle -> vehicle areas -> vehicle rear

Vehicle data
Bentayga Series
Sales types
Type
4V1*
4V1*
4V1*
4V1*
4V1*
4V1*
4V1*
4V1*
4V1*
ZV1*
ZV1*
ZV1*

MY
2017
2018
2019
2020
2021
2022
2023
2024
2025
2023
2024
2025

Brand Designation Engine code Gearbox code
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*
E
*
*

Documents
Document name
master.xml

Final drive code
*
*
*
*
*
*
*
*
*
*
*
*

Complaint type
noises, vibrations ->
noise
functionality ->
activates
noises, vibrations ->
too loud

Position
> no
instruction <

> no
instruction <

Technical Service Bulletin
Exhaust Flap Control Unit - Various DTCs | Bentayga Series | 17-25MY

Transaction No.: 2077982/1
Release date: Jun 5, 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)