2045686.2

Technical product information
Topic
Market area
Brand
Transaction No.
Level
Status
Release date
Bentayga - Engine oil pressure warning
Bentley: worldwide (2WBE),Hongkong-Macau (5HK)
Bentley
2045686/2
EH
Approval
Event memory entries
Diagnostic address
Event memory entry
Fault type Fault status
0001 - Engine Control Module 1 P15AA00: Engine oil pressure Lower limit not reached
0001 - Engine Control Module 1 P15AA00: Engine oil pressure Lower limit not reached
static
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
Sales types
Type MY Brand Designation Engine code Gearbox code Final drive code
4V1* 2017 E
4V1* 2018 E
*
*
*
*
*
*
Chassis numbers
Manufacturer Filler Type Filler MY Factory From To
Prod from Prod to
SJA
*
*
*
H C
000001 021025
Documents
Document name
master.xml
Complaint type
Position
control units, services -> with event log
entry
electrics
functionality -> increases
Technical product information
Bentayga - Engine oil pressure warning
Transaction No.: 2045686/2
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:
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