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

Engine coolant - Overheat condition - Warning evident within the DIP - DTC's P2B6500 and P2B8600 are evident
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
2066669/3
EH
Released for publishing
28-Sep-2023

Event memory entries
Diagnostic address
0001 - Engine electronics
0001 - Engine electronics
0011 - Engine Electronics 2
0011 - Engine Electronics 2

Event memory entry
Fault type Fault status
P2B6500: Coolant Pump "B" Air in System
static
P2B8600: Coolant Pump "A" Overspeed/Air in System
static
P2B6500: Coolant Pump "B" Air in System
static
P2B8600: Coolant Pump "A" Overspeed/Air in System
static

New customer code
Object of complaint
engine -> cooling, lubrication
engine -> cooling system
engine -> cooling system -> coolant expansion tank

Complaint type
Position
functionality
functionality
leaks -> coolant leak

Vehicle data
W12 - New Continental GT/GTC & New Flying Spur
Sales types
Type

MY

Brand Designation Engine code Gearbox code Final drive code

3S31BB
3S31BB
3S31BB
3S31BB
3S31BB
3S31BB
3S31BB
3S31EB
3S31EB
3S31EB
3S31EB
3S31EB
3S41BB
3S41BB
3S41BB
3S41BB
3S41BB
3S41BB
3S41EB
3S41EB
3S41EB
3S41EB
3S41EB

2018
2019
2020
2021
2022
2023
2024
2020
2021
2022
2023
2024
2019
2020
2021
2022
2023
2024
2020
2021
2022
2023
2024

E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E

INTERNAL

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*

ZG21BB
ZG21BB
ZG21BB
ZG21BB
ZG21BB
ZG26BB
ZG26BB

2020
2021
2022
2023
2024
2023
2024

E
E
E
E
E
E
E

Documents
Document name
master.xml

INTERNAL

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Technical product information
Engine coolant - Overheat condition - Warning evident within the DIP - DTC's P2B6500 and P2B8600 are evident

Transaction No.: 2066669/3
Release date: 28-Sep-2023

Customer statement / workshop findings
Customer statement
•

Engine cooling system overheating

And/or
•

Coolant loss

And/or
•

Warning light in Drivers Information Panel (DIP) as Figure 1

Figure 1
Workshop findings
The following DTC’s may also be evident within 0001 and/or 0011
•

P2B6500 and/or P2B8600

Technical background
NOTE: Should the symptoms or a combination of the symptoms mentioned within the Customer statement/workshop findings
section be evident, the operative should consider the instructions within Measure section of this TPI

Production change
-

Measure
CAUTION: The operative must ensure the engine has cooled sufficiently before carrying out this procedure

CAUTION: The operative must wear eye protection for the duration of this procedure
It is imperative the instructions are strictly followed, the steps must be conducted to ensure the coolant system is to
specification before conducting any repair work or replacement of parts
1) Referring to Rep.Gr 19 - Conduct a coolant system pressure test NOTE: Depending on the amount of coolant which has been lost
the coolant system may have to be filled and the coolant bleed process conducted before carrying out the pressure test
Were any issus found after conducting step 1 (Coolant pressure test)?
No - Conduct step 2
Yes - Raise a DISS query ensuring all applicable information is attached to the DISS query for example: Current ODIS log, photographs/videos,
clears symptom description NOTE: The operative must wait for a reply from Product Support before conducting any further work
2) Referring to Figure 2 - Locate the vent hose shown (975 122 447H)

INTERNAL

Figure 2
•

The vent hose has an internal check valve, the valve is positioned within the vent hose at the location shown in Figure 3 (Circled)

Figure 3
•

Referring to Figure 4 - The coolant flows in the direction shown (Arrows) in the event the internal check valve is faulty the flow of the
coolant will be restricted (Causing the symptoms described within the customer findings/workshop findings section)

Figure 4

INTERNAL

3) The operation/condition of the check valve can be confirmed as follows:
•

Referring to Figure 5 - Disconnect the vent hose from the Thermostat housing

Figure 5
•

Referring to Figure 6 - To minimise coolant loss, temporarily fit a blanking plug over the stub pipe

Figure 6
4) Referring to Figure 7 - Remove the coolant reservoir cap (Point A)
•

Open the service clip on the bleeder valve (Point B)

INTERNAL

Figure 7
5) Referring to Figure 8 - Apply light air pressure into hose (Arrow)

Figure 8
Does the air flow through the vent line without any restrictions?
No - Go to step 4
Yes - Raise a DISS query and await feedback before conducting any further work
4) Replace the vent line
•

Once the vent line has been replaced - Referring to Rep.Gr 19 - Bleed the coolant system

•

Erase all applicable DTC’s

•

Conduct a road test - On return check to confirm that no coolant related DTC’s are evident

INTERNAL

Warranty accounting instructions
Warranty Type
110 or 910
Damage Service Number 19 44
Damage Code
00 10
Time to pressure test the coolant system
Labour Operation Code 19 01 01 00
Time
10 TU
Time to replace the vent hose
Labour Operation Code 19 62 19 07
Time
40 TU
Time to top up and bleed the coolant system
Labour Operation Code 01 50 00 00
Time
As per DIS log (Must not exceed 50 TU)
Road test
Labour Operation Code 01 21 00 00
Time
50 TU

Parts information
Description

Part Number

Quantity

Vent hose

975 122 447H

1

Springband clamp (Thermostat housing)

Refer to ETKA

1

INTERNAL