No. 2305

Bulletin #: 2305
Advanced Technical Information
Part ID: 8272
8
Additional Coolant Pump Fault (P0C4700) Causes MIL
Vehicles Affected
Models
Model Year
Model Type
VIN Range
Vehicle-Specific Equipment
Cayenne
2015 - 2017
92A
n/a
PHEV
Revision History
Revision
Release Date
Changes
0 (ATI Grp 1 1704)
September 26, 2017
Original document
1 (ATI Grp 1 1801)
February 8, 2018
Update of Service Information
2
March 1, 2023
Update of PartID
Condition
The customer observes a Malfunction Indicator Lamp (MIL). (Note: Typically, this MIL is the only symptom of this
issue.)
Technical Background
The technician confirms the MIL and notes P0C4700 is present in the high-voltage battery.
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Mar 1, 2023
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Bulletin #: 2305
Advanced Technical Information
Part ID: 8272
8
Service Information
New guided fault finding appears in PIWIS tester version 37.000 and higher. Please follow the instructions given in
this resource before proceeding with the information in this ATI.
In many cases, technicians noted one or more of the following root causes:
a) Corrosion on Ground Pin 6B (See figures 1 and 2.)
b) Corrosion on the connector to the secondary low temperature coolant pump.
c) A bad ground or otherwise unsound wiring.
The service recommendation is to check the ground, connector, and wiring for corrosion and circuit continuity.
Repair the ground, connector, or wiring as needed. Sometimes, the ground bolt is painted and not adequately
conductive. In this case, clean the ground bolt and eyelet using a wire brush and sandpaper. If the ground, connector,
and wiring are acceptable, replace the electric water pump and the electric water pump relay.
Figure 1 - Ground PIN 6B
Figure 2 – Example of corrosion on ground point
AfterSales
Mar 1, 2023
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Bulletin #: 2305
Advanced Technical Information
Part ID: 8272
8
Warranty
As always, be sure to document the repair completely in PQIS.
For this repair, please code the “cause” as follows:
Cause location:		
82720 Circulating pump
Cause symptom:
1611 No function
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.
©2023 Porsche Cars North America, Inc.
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