Technical product information
Bentayga V8 Kovomo - Fuel Pressure Regulation
Russische Föderation (5RU),Australia E04 Bentley rest Asia and Australia (6E04),China 796 VW Import Comp. Ltd (Vico), Beijing
(6796),Germany E02 Bentley rest Europe (6E02),Japan E03 Bentley Japan (6E03),Korea, (South) E08 Bentley South Korea
(6E08),United Arab Emirates E06 Bentley Middle East and Africa (6E06),United Kingdom E01 Bentley UK (6E01),United States
E05 Bentley USA and rest America (6E05)
Bentley

Topic
Market
area
Brand

Transaction
2062080/3
No.
Level
EH
Status
Approval
Release
date
New customer code
Object of complaint

Complaint type

information, navigation, communication, entertainment -> symbolic fault indicators -> fault indicator for fuel
system
information, navigation, communication, entertainment -> symbolic fault indicators -> emission control system
fault indicator

functionality ->
activates
functionality ->
activates

New workshop code
Object of complaint
engine -> fuel supply -> low-pressure fuel pump (tank)
engine -> operation, engine control -> engine control unit
engine -> operation, engine control -> engine control unit
engine -> operation, engine control -> engine control unit
engine -> operation, engine control -> engine control unit
engine -> operation, engine control -> engine control unit

Complaint type
Position
functionality -> uneven
functionality -> misfire
electrics -> ground connection damaged
control units, services -> with event log entry
control units, services -> measured value too high
control units, services -> error message

Vehicle data
Bentayga - V8 Kovomo
Sales types
Type

MY Brand Designation Engine code Gearbox code Final drive code

4V14D9
4V14D9
4V14D9
4V14D9

2018
2019
2020
2021

E
E
E
E

Documents
Document name
master.xml
measurement.pdf

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Position

Technical product information
Bentayga V8 Kovomo - Fuel Pressure Regulation

Transaction No.: 2062080/3

Customer statement / workshop findings
Check Engine Lamp illuminated within the Driver Instrument Panel (DIP) with one or multiple DTC’s as detailed below:
•

“ P310B00 with symptom code 2636 - Low Fuel Pressure Regulation” Low Fuel Pressure Regulation”

•

“ P014800 Fuel Deliver Error”

•

“P019100 Fuel Rail pressure Sensor ‘A’ Circuit Range/Performance

•

“ Misfire ” DTC’s

There may be multiple DTC’s and symptoms present due to fuel pressure regulation or fuel supply issues

Technical background
In the event the customer complaint relates to the following:
•

Customer experienced poor start up - proceed with the remaining instructions

NOTE: The operative must gather information regarding the Customer experience regarding when the issue occurred for example: Preconditions, warning lights and driveability at the time that the issue occurred, details when the vehicle was last refuelled and the grade of fuel
used
The operative must now use the information contained within the “Measure” section to determine the correct analysis and repair procedure.

Production change
Not applicable.

Measure
Check Engine Lamp Illumination with DTC P310B00 and symptom code 2636 - Engine Running Concerns, Fuel system issues
• “ P310B00 Low Fuel Pressure Regulation – symptom code 2636”
•

“ P014800 Fuel Deliver Error”

•

“P019100 Fuel Rail pressure Sensor ‘A’ Circuit Range/Performance

•

“ Misfire ” DTC’s

1) If not already done, raise a DISS query.
2) Check “Low fuel pressure, specified value” and “Fuel low pressure, actual value” within the fault memory, refer to ECU “01 –
Engine Control Module 1” - From “Extended ambient conditions” note the values of the “Low fuel pressure, specified value” and
“Fuel low pressure, actual value ” as shown in Figure 1.

Figure 1
•

If not already done, raise a DISS query, add the following results / information.

Note the “Low fuel pressure, specified value” and “Fuel low pressure, actual value” on the DISS query.
•

Using ODIS Measured values check low fuel pressure when the vehicle is starting or idling – this should normally be 400 – 800 kPa

•

Check the fuel system pressure at the fuel tank outlet with a pressure gauge, this should be the same as the figure measured with ODIS or
approximately 100 kPa lower if the gauge is relative to atmospheric pressure

•

After switching the engine off the pressure within the fuel system should remain at 400 kPa or above for at least ten minutes

•

Check the fuel pump ECU electrical earth point condition, check for debris, cleanliness and tightness of earth point nut - if any issues were
found - Rectify as required

•

Record results on the DISS query, attach clear photograph(s)

•

Check all fuel pump ECU connector pins for signs of contamination or damage. Check for any other concern that may lead to poor
retention, high resistance or poor connection. Ensure issues noted during this inspection are corrected

3) Fit a new fuel pump control module with the part number of 4M4 906 121B
•

Clear any fault codes that may be present and conduct a short road test, make a note of any fault codes that are logged during the road
test

•

Should any issues be evident from any previous technical checks/inspection or for example:

DTC’s logged during the road test
The issue can be reproduced
Repeat visit for the same issue
Fuel level shown in the DIP does match the actual amount of fuel which is in the tank (as applicable MWB’s)
•

The Operative MUST add any relevant information to the DISS query

Or
•

Should no issues be evident, the car can be returned to the customer

Warranty accounting instructions
Warranty type - 110 or 910
Damage Service Number 20 66
Damage Code
01 00
Time to remove and replace the fuel pump control unit (J538)

Labour Operation Code 20 70 19 50
Time
10 TU
Self Diagnosis
Labour Operation Code 01 50 00 00
Time
30 TU - Time taken from diagnostic log (Maximum 30TU)
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

Parts information
Fuel pump control unit - 4M4 906 121B (x1)