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

Bentayga - Check Engine Lamp - Fuel Pressure Regulation
Bentley: worldwide (2WBE)
Bentley
2058484/1
EH
Approval

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
Sales types
Type
4V14D9
4V14D9
4V14D9

MY
2018
2019
2020

Brand
E
E
E

Documents
Document name
master.xml

Designation
SUV KoVOMo BY636 404/V8 8AG
SUV KoVOMo BY636 404/V8 8AG
SUV KoVOMo BY636 404/V8 8AG

Engine code Gearbox code
DCUA
RWH
DCUA
RWH
DCUA
RWH

Final drive code
QUT
QUT
QUT

Position

Technical product information
Bentayga - Check Engine Lamp - Fuel Pressure Regulation

Transaction No.: 2058484/1

Customer statement / workshop findings
Check Engine Lamp illuminated on Driver Instrument Panel (DIP)
Diagnostic Trouble Code (DTC) “ P310B00 Low Fuel Pressure Regulation” stored in the Engine Control Unit (ECU).
DTC “ P014800 Fuel Delivery Error” stored in the ECU.
“ Misfire ” DTC stored in the ECU.

Technical background
There may be multiple DTC’s and symptoms present due to fuel pressure regulation or fuel supply issues, 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 And DTC “P0310B00”
For vehicles that have only the symptoms “Check Engine Lamp Illumination”, DTC “P031B00” and an “Adaption of Fuel Pump (FP)” figure of
minus 100 to minus 200 kPa – figure 1 - the Fuel Delivery Module within the fuel tank should be replaced – figure 2 – refer to Repair Group 20
Fuel supply, gas operation / 4.0L V8 TSI / Fuel pump, fuel level sensors, and jet pump (RH) – To remove and fit.
To check the “ Adaption of Fuel Pump (FP) ” figure within the fault memory, refer to ECU “ 01 – Engine Control Module 1” From “ Extended ambient conditions” note the value of the “Adaption of Fuel Pump (FP)” – figure 1.

Figure 1

Figure 2

Check Engine Lamp Illumination, Engine Running Concerns, Fuel System and Misfire DTC’s
With symptoms of “Check Engine Lamp Illumination”, “Poor Engine Running” accompanied with one or more of the following DTC’s:
•

“ P310B00 Low Fuel Pressure Regulation”

•

“ P014800 Fuel Deliver Error”

•

“ Misfire ” DTC’s

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 ” – figure 3.

Figure 3
Next, raise a DISS query.
•

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

•

Attach a diagnostic log and report if the fault is reproducible.

The following checks may also be requested via the DISS query:
•

Low pressure fuel system – Fuel pressure check using ODIS measured values when the vehicle is starting or idling – this should normally
be 400 – 800 kPa.

•

If possible, 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. If the fuel
system pressure is not as expected it may be necessary to check the fuel tank internally – check for disconnected or punctured fuel lines.

•

Check the fuel level within the fuel tank, check the fuel pump electronic control unit electrical earth point condition and check for debris
within the fuel tank.

•

If removed, the fuel pump and fuel pump control module may be required for further analysis.

Warranty accounting instructions
Warranty type – 790 or 710
Damage Service Number – 2066
Damage Code – 0100
Labour Operation Codes 01 29 00 30 - Self Diagnosis - 30TUs
20 66 19 50 - Electric Fuel Pump - Remove + Reinstall - 50TUs
70 49 19 01 - Rear Floor Covering - Remove + Reinstall - 300TUs

Parts information
For the latest part information always refer to the Electronic Parts Catalogue – ETKA.