Porsche Cayenne 2015–2017 — technical service bulletin
Bulletin 122-A3L7Z-10 · NHTSA communication 10119311 · issued Sep 26, 2017
Technical service bulletin
communication type
Electrical System
component
2015–2017
model years
3
vehicle entries
Official summary
Technical Concern: The technician confirms the MIL and notes P0C4700 is present in the high-voltage battery. Service Information: 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.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.