Technical product information
Topic
Market area
Brand
Transaction No.
Level
Status
Release date

Bentayga W12 - DTC 310B00 - Low fuel pressure regulation
Bentley: worldwide (2WBE),Hongkong-Macau (5HK)
Bentley
2055321/2
EH
Approval

New customer code
Object of complaint

Complaint type Position

engine -> engine operation
functionality
engine -> operation, engine control functionality
engine -> fuel supply
functionality

Vehicle data
Bentayga W12
Sales types
Type
4V14A9
4V14A9
4V14A9
4V14A9
4V14A9
4V14G9
4V14G9

MY
2017
2018
2019
2020
2021
2020
2021

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

Documents
Document name
master.xml

Gearbox code
*
*
*
*
*
*
*

Final drive code
*
*
*
*
*
*
*

Technical product information
Bentayga W12 - DTC 310B00 - Low fuel pressure regulation

Transaction No.: 2055321/2

Customer statement / workshop findings
Engine stalling when the engine is started from cold (at idle)
Or
After a delayed cold start
These issues can trigger DTC 310B00: Low Fuel Pressure regulation, Fuel pressure outside specification
The following symbol can also be displayed on the Driver Instrument Panel (DIP) in conjunction with an error message “start/stop unavailable”

Technical background
Prior to conducting the instructions within this TPI, the retailer must check and confirm there are no other issues evident with the
vehicle for example:
•

Misfire related DTC’s

•

Low pressure fuel DTC’s other than DTC 310B00

•

Damaged fuel hoses and pipes – Examine all hoses and pipes external of the fuel tank

•

Fuel leaks

•

Correct grade and correct type of fuel within the fuel tank

•

Vibration noises from the fuel tank (Fuel pumps noisy)

IMPORTANT: Should any issues be found these should be rectified and the vehicle tested to confirm the actual issue/symptoms described
within the Customer statement section of this TPI are evident prior to carrying out the onward instructions

Production change
Not applicable

Measure
Prior to starting any work, the operative must adhere to all instructions within Elsa pro Rep.Gr 20 - Fuel system - Safety
precautions - Fuel system - Rules for cleanliness and Special Instructions for Fuel System Quick Connectors

The use of safety glasses is recommended for the duration of this procedure
1) Check and confirm the Fuel tank pump assembly Pulse Width Modulation (PWM) value as follows:
•

Ensure the engine is idling at operating temperature - Ensure a suitable battery charger is also connected as per Rep.Gr 27

•

Select Engine control module 1

•

Select Guided functions – Read measured values

•

Referring to Figure 1 - Navigate to Measured value IDE01893

•

Select Starting update and monitor the Value – The value should be below 25%

NOTE: If the fuel pumps run faster at idle (above 25%) this is a sign of either a significant leakage or that the wrong fuel pump control modules
are fitted - Carry out an inspection of the vehicles repair history, should the fuel pump control modules have been previously replaced you must
ensure the correct specification were fitted, however if there is no replacement history of the control modules continue to step 2 – Fuel low
pressure check

Figure 1
2) Fuel low pressure check - Referring to Figure 2 (Point A) navigate to Measured value IDE00186 Fuel low pressure, actual value
•

Select OK (Point B)

Figure 2
•

Referring to Figure 3 – Select Starting update

•

Switch off the engine and leave the ignition on

•

Monitor the pressure decay of the low pressure fuel system for 10 minutes

Figure 3

3) Should the pressure drop below 300 kPa after 10 minutes - Referring to Figure 4 - Gain access to the fuel pump assembly and fuel filter within
the right hand side of the fuel tank - Rep.Gr 20

Figure 4
•

Carry out an inspection of ALL accessible hoses and connections which connect to the fuel pump assembly/fuel filter assembly as shown
in Figures 5 and 6

•

Check for punctured/split hoses

•

Check for broken and loose connections

Figure 5

Figure 6
4) Referring to Figure 7 (For photographic purposes Figure 7, was taken with the fuel pump assembly removed from the fuel tank) Check the
connection shown is not broken NOTE: Care should be taken when checking this part as damage can be caused when manipulating the fuel
pump assembly

Figure 7

IMPORTANT: Only the components on the right hand side of the fuel tank are interchangeable, if there is a fault with any components on the
left hand side or with any components which are not listed within the ETKA parts catalogue a new fuel tank is required
All VIN’s to SJAAP14V0LC026999
•

Should any issues be found with the fuel pump assembly or fuel filter replace the fuel pump assembly and fuel filter as per the applicable
Rep.Gr

All VIN’s from SJAAF1ZV9KC027000
•

Should any issues be found with the fuel pump assembly or fuel filter after the checks from Steps 1 through to 4 have been conducted The operative MUST raise a DISS query and await feedback before conducting any further work

VERY IMPORTANT: Please return any parts which have been replaced using the parts return system, ensure a reference of this
TPI is included when the parts are returned

Warranty accounting instructions
Time to replace the Fuel delivery module
Warranty type - 110 or 910
Damage Service Number 20 66
Damage Code
01 00
Labour
Labour Operation Code 20 66 19 50
Time
50 TU
Time to remove and refit the rear seats (4 seat)
Labour Operation Code 68 16 19 01
Time
190 TU
Time to remove and refit the rear seats (5 seat)
Labour Operation Code 72 48 20 05
Time
100 TU
Time to remove and refit the seat sill panel
Labour Operation Code 68 05 19 00
Time
20 TU
Time to remove and refit the boot side trim panel
Labour Operation Code 70 03 19 00
Time
40 TU
Self Diagnosis
Labour Operation Code 01 50 00 00
Time
Time taken from diagnostic log (Maximum 30TU)
Time to replace the fuel tank
IMPORTANT: Only the components on the right hand side of the fuel tank are interchangeable, if there is a fault with any components on the
left hand side or with any components which are not listed within the ETKA parts catalogue a new fuel tank is required
4 Seat
Labour Operation Code 20 10 19 00
Time
590 TU
5 Seat
Labour Operation Code 20 10 19 05
Time
540 TU

Parts information
IMPORTANT: Please ensure TPI 2055235/- is also referred to