Porsche Cayenne 2021 — technical service bulletin
Bulletin No. 2230 · NHTSA communication 10222549 · issued Sep 28, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2021
model years
2
vehicle entries
Official summary
Instructions on advanced technical information - DME Fault P25B400 (008403) â Wastegate, turbocharger bank 1 â stuck closed
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.