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

Bentayga - Engine oil pressure warning
Australia E04 Bentley rest Asia and Australia (6E04),China 723 Volkswagen (Anhui) Automotive CO (6723),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
2045686/6
EH
Released for publishing
25-Sep-2023

Event memory entries
Diagnostic address
Event memory entry
Fault type Fault status
0001 - Engine electronics P15AA00: Engine oil pressure lower limit not reached
static
0001 - Engine electronics P15AA00: Engine oil pressure lower limit not reached
Intermittent
New customer code
Object of complaint
vehicle service -> vehicle diagnosis -> guided fault finding
engine -> lubrication system
information, navigation, communication, entertainment -> instrument displays -> engine oil
pressure indicator

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

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

Brand Designation Engine code Gearbox code Final drive code
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*
E
*
*
*

Documents
Document name
master.xml

INTERNAL

Complaint type
Position
control units, services -> with event log
entry
electrics
functionality -> increases

Technical product information
Bentayga - Engine oil pressure warning

Transaction No.: 2045686/6
Release date: 25-Sep-2023

Customer statement / workshop findings
Low oil pressure warning illuminated in the driver instrument panel as shown in Figure 1 and event code P15AA00 is evident in one or both of the
Engine Control Modules

Figure 1

Technical background
One failure mode for the oil control valve (item 1 Figure 2) results in low engine oil pressure when engine rpm is above 3500 and as with any low
oil pressure occurrence the Oil pressure too low warning will be displayed in the driver instrument panel. Obviously this warning is legitimate and
when it is the case that the oil control valve has failed then a replacement valve will rectify the issue, but other causes of low engine oil pressure
will trigger this warning and these should not be overlooked. It is therefore critical that the root cause of the low oil pressure is identified.

Production change
Not applicable

Measure

Figure 2
In the event of Oil pressure too low warning displayed in the driver instrument panel as shown in Figure 1 and event code P15AA00 evident in
one or both of the engine control modules then carry out the following checks to confirm the diagnosis is correct before considering replacing the
oil control valve (item 1 Figure 2)

Primary Checks
1. Confirm engine oil level is correct, if not then correct and retest car
2. Drain and inspect engine oil and engine oil filter for debris (Refill with new engine oil and fit new engine oil filter). If debris is present
investigate cause. If required raise a DISS concern for Product Support assistance.
3. Check the function of the suspect solenoid by using the following process:

INTERNAL

The oil control valve is switched (off) at approximately 3500rpm to give a substantial and affectively instant increase oil
pressure to meet expected engine demand. When this is functioning correctly the increase in oil pressure can be observed
in the measured values as an instant increase in pressure by at least 100kPa.
Using Bentley diagnostic tool access Engine Control Module 1 (01)
Within engine control module select the following measured values
•

Oil temperature in sump IDE06570

•

Oil pressure actual value IDE02742

•

Engine speed IDE00021

Drive the vehicle in manual mode in order to keep the vehicle speed down whilst a colleague monitors the above pre-selected measured values
With the oil temperature in the sump below 100°c observe the oil pressure value change as the engine rpm increases through approximately
3500 rpm. If the oil pressure significantly rises as the engine rpm passes through 3500 rpm then the oil control valve is functioning correctly. If
an instant raise is not seen and the Oil pressure too low warning is displayed in the driver instrument panel then replace the oil control valve with
new part, part number 07P115243. Reference workshop manual Rep.Gr.17 - Valve for oil pressure control (N428) - To remove and fit.

Figure 3

Figure 4
Figure 3 displays a 483kPa reading just below the 3500 rpm (2806 1/min) switching point and figure 4 displays the instant and substantial
increase to 671kPa observed on a correctly functioning valve as engine rpm raises through 3500 (3525 1/min). Note: the pressure readings
shown in the measured value are ‘absolute’
If as a result of the above tests no root cause is found then raise a DISS query with Product Support

Parts information
Part number

Description

Quantity

07P115243

W12 oil control valve

1

INTERNAL