No. 2235.2

Bulletin #: 2235.2
Advanced Technical Information
Part ID: 1950
1
Display of “Coolant Temperature Too High” in G2, Macan and E3
Vehicles Affected
Models
Model Year
Model Type
VIN Range
Vehicle-Specific Equipment
Panamera
2017 - 2021
All V6 engines
n/a
n/a
Macan
2019 - 2021
All V6 engines
n/a
n/a
Cayenne
2019 - 2021
All
n/a
n/a
Revision History
Revision
Release Date
Changes
0
December 20, 2022
Original document
1
January 23, 2023
Update of Panamera model type
2
May 30, 2023
Update of Part ID
Condition
Customer complains about “Coolant temperature too high” warning message, fault code B19A750 in the 			
Figure 1 - Owner’s Manual Information for Over-Temperature Warning (B19A750)
Instrument Cluster: “Display of coolant temperature too high, active”.
AfterSales
May 30, 2023
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Bulletin #: 2235.2
Advanced Technical Information
Part ID: 1950
Technical Background
The aforementioned warning message only displays when temperatures exceed the warning thresholds. In contrast
to “TI, 1950 Warning Message “Coolant Temperature Too High”: Checking Coolant Pump and Change-Over Valve
(173/21)”, please replace the ‘change-over valve’ in combination with this warning, regardless of whether or not it 		
passes the function test as outlined in TI 173/21.
Service Information
1.
2.
3.
4.
Check and verify vehicle model year
Check for damage in the coolant pump and replace if necessary, per the instruction in WM – 195019
Replace change-over valve
Check for damage and residue in vacuum lines and replace if necessary.
Warranty
As always, please document the repair completely in PQIS.
For this repair, please code the “cause” as follows:
Cause location:		
19500 Coolant pump
Cause symptom:
1611 No function
Use the following troubleshooting labor operation:
03350050		
On board diagnostic
19010150		
Cooling system check
19505521		
Check change-over valve, replace change-over valve and coolant pump (V6 engine)
19383550 		
Coolant inspect and add
03350053		
On board diagnostic
Search Items
Coolant leak, water pump, change-over valve, switching valve, overheating, temperature
Important Notice: Technical Bulletins issued by Porsche Cars North America, Inc. are intended only for use by professional automotive technicians who have attended Porsche service training courses. They are
written to inform those technicians of conditions that may occur on some Porsche vehicles, or to provide information that could assist in the proper servicing of a vehicle. Porsche special tools may be necessary in
order to perform certain operations identified in these bulletins. Use of tools and procedures other than those Porsche recommends in these bulletins may be detrimental to the safe operation of your vehicle, and
may endanger the people working on it. Properly trained Porsche technicians have the equipment, tools, safety instructions, and know-how to do the job properly and safely. Part numbers listed in these bulletins
are for reference only. The work procedures updated electronically in the Porsche PIWIS diagnostic and testing device take precedence and, in the event of a discrepancy, the work procedures in the PIWIS Tester
are the ones that must be followed.
A13168
©2023 Porsche Cars North America, Inc.
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