Service

Technical Information

173/21 ENU

1950

1

Warning Message “Coolant Temperature Too High”: Checking Coolant Pump and Change-Over Valve
(173/21)
Change overview:

Model Line:

Release

Date

Change

0

12/19/2022

•

First publication

1

03/12/2024

•

Addition of V8 order types

2

07/26/2024

•

Update of parts information for V8 Biturbo

3

01/07/2025

•

Addition of PAB121237 for V8 Biturbo

Macan S (95B) / Macan GTS (95B) / Macan Turbo (95B)
Cayenne (9YA / 9YB)

Model Year:

As of 2018 up to 2023

Equipment:

V6 Turbo engine

Concerns:

Change-over valve for coolant pump

Cause:

The customer complains about a warning message “Coolant temperature too high”. A faulty coolant pump is
detected as the cause. Internal tests have shown that in some cases, the cause of a defective coolant pump
is a faulty change-over valve for the coolant pump.

Action required: If the coolant pump is faulty or leaking, also check the change-over valve for the coolant pump and replace it
if necessary.
Model Line:

Cayenne (9YA / 9YB)

Equipment:

4.0-liter V8 Biturbo engine

Concerns:

Change-over valve for coolant pump

Cause:

The customer complains about a warning message “Coolant temperature too high”. A faulty coolant pump is
detected as the cause. Internal tests have shown that in some cases, the cause of a defective coolant pump
is a faulty change-over valve in the coolant pump.

Action required: If the coolant pump is faulty or leaking, also check the change-over valve for the coolant pump and replace it
if necessary.

AfterSales

Jan 7, 2025
Page 1 of 12

1

Service

Technical Information

ENU 173/21

1950

Required tools, parts and material (V6 Turbo)
Tools:

•
•
•

P90999 - PIWIS Tester 4
Hand vacuum pump, e.g. VAS 6213 - Hand vacuum pump
Battery charger with a current rating of at least 90 A and - if required - also with a current and voltage
controlled charge map for lithium starter batteries, e.g. VAS 5908 90 A battery charger

For further information about the battery chargers to be used, see the corresponding Workshop Manual. ⇒
Workshop Manual '270689 Charging vehicle electrical system battery'
Parts Info:

Required parts:
Part No.

Designation
– Location

Number

PAB906283

⇒ Change-over valve
– Coolant pump

1 piece

and/or
9A712101304

⇒ Coolant pump

1 piece

Additional parts required for replacing the coolant
pump:

Materials:

9A712111903

⇒ Seal
– Coolant pump

1 piece

9A712117100

⇒ Sealing ring
– Coolant pipe above coolant pump

1 piece

9A700565200

⇒ O-ring (17 x 3)
– Coolant pipe above coolant pump

1 piece

9A712143713

⇒ Sealing ring (41.8 x 1.85)
Disconnect coolant pipe for coolant pump

1 piece

9A700792000

⇒ O-ring (31.34 x 3.53-N)
Disconnect coolant pipe for coolant pump

1 piece

Required materials (usually already available in the Porsche Center):
Part No.
00004330501
00004330516

Jan 7, 2025
Page 2 of 12

Designation
– Location
⇒ Grease
– O-rings
⇒ Coolant additive

AfterSales

Quantity
5 grams/ 0.176 oz
0.5 liter/ 16.9 fl oz

Service

Technical Information

173/21 ENU

1950

1

Required parts and materials (V8 Biturbo)
Parts Info:

Part No.

Designation
– Location

Number

9A7906283

⇒ Change-over valve
– Change-over valve coolant pump

1 piece

⇒ Coolant pump

1 piece

and/or
PAB121014C

Additional parts required for replacing the coolant pump:
9A712122801

⇒ Seal
– Coolant pump

1 piece

9A700781400

⇒ O-ring (55 x 5.33)
– Coolant distributor housing on coolant pump

1 piece

9A712113900

⇒ Seal
– Coolant distributor housing outer

2 pieces

9A700780900

⇒ O-ring (80 x 4)
– Coolant distributor housing center

1 piece

PAB121237

⇒ Connecting tube
– Coolant distributor housing

1 piece

95510742700

⇒ Round seal (12 x 2)
– Guide tube for oil dipstick

1 piece

N 90774002

⇒ Hexagon-head bolt (combination)
(M16 x 1.5 x 75)
– Crankshaft vibration damper

1 piece

9A726093806

⇒ Deflection roller with screw
– V-ribbed belt for air-conditioning compressor

1 piece

PAC906054A

⇒ Oil pressure sensor
– >> - 30/04/2023

1 piece

⇒ Oil pressure sensor
– 01/05/2023 >>

1 piece

or
PAB906060

Valid for vehicles with Porsche Dynamic Chassis Control (PDCC) (M-No. 1P7) and without engine underprotection (M-No. 1SF)
PAF00072900

⇒ Hexagon socket head bolt
– Front section of front underbody cover

3 pieces

or
Valid for vehicles with engine underprotection (M-No. 1SF)

AfterSales

Jan 7, 2025
Page 3 of 12

1

Service

Technical Information

ENU 173/21

1950

N 10082912

⇒ Hexagon flange bolt (combination), M6 x 16
– Front engine protection on holder

3 pieces

Additional parts required for adjusting the chassis:

Materials:

PAF91237901

⇒ Hexagon flange bolt (combination)
(M14 x 1.5 x 100)
– Front axle carrier on body rear

4 pieces

PAF91184301

⇒ Hexagon-head bolt (M12 x 1.5 x 90)
– Front axle carrier on body front

4 pieces

PAF005372

⇒ Cheese head bolt with multiple-tooth head
(M12 x 1.5 x 51)
– Front axle support to front axle carrier

2 pieces

PAF911511

⇒ Hexagon-head bolt (combination)
(M12 x 1.5 x 42)
– Front axle support to front axle carrier

4 pieces

WHT002305

⇒ Square nut (M12 x 1.5)
– Front axle support to front axle carrier

4 pieces

Required materials (usually already available in the Porsche Center):
Part No.
00004330501
00004330516

Designation
– Location
⇒ Grease
– O-rings
⇒ Coolant additive

Quantity
5 grams/ 0.176 oz
0.5 liter/ 16.9 fl oz

Required tools (V8 Biturbo)
Tool:

•
•
•
•
•
•
•
•
•

Torque wrench, 2-10 Nm (1.5-7.5 ftlb.), e.g., V.A.G 1783 - torque wrench, 2-10 Nm (1.5-7.5 ftlb.)
Torque wrench, 20-100 Nm (15-74 ftlb.), e.g., VAS 5820 - torque wrench, 20-100 Nm (15-74 ftlb.)
Torque wrench, 40-200 Nm (30-148 ftlb.), e.g., V.A.G 1332A - torque wrench, 40-200 Nm
(30-148 ftlb.)
Hand vacuum pump for checking the changeover valve of the coolant pump, e.g. VAS 6213 - Hand
vacuum pump
VAS 6890 - Spring band clamp pliers
T40330 - Counter-hold tool
T40363 - Socket wrench a/f 24
P90999 - PIWIS Tester 4
Battery charger with a current rating of at least 90 A, e.g., VAS 5908 - battery charger 90 A

Additionally required tools for draining and refilling coolant:
•
•
•
Jan 7, 2025
Page 4 of 12

9696 - Filling device
3094 - Hose clamp
VAS 6096/2 - Vacuum pump

AfterSales

Service

Technical Information

173/21 ENU

1950

1

Additionally required tools for measuring and adjusting the assist systems:
•
•
•
•
•
•
•
•
•
•
•

9229/1 - Puller hook
T40183 - Insertion tool
VAS 6826 - Steering wheel balance
VAS 6918 - Quick-clamping unit
VAS 6430/1A - Adjustment device with reflector
VAS 6430/3 - Mirror for adjustment device
VAS 6350A - Calibration unit
VAS 6430/6 - Night View Assist calibration unit
VAS 6430/4 - Lane Keep Assist calibration board
VAS 6350/2A - Spacing laser
VAS 721 001 - Calibration System

Additionally required Tools for adjusting the main headlights:
•
•
•

LED headlights: VAS 5209B - Headlight aiming device
Setting LED headlights or Matrix LED headlights: VAS 5208A - Headlight aiming device
MATRIX LED headlights: VAS 621 001 - Headlight adjusting unit

Preparatory work (V6 Turbo)
Work Procedure: 1