Mazda CX-9 2016–2018 — technical service bulletin
Bulletin SA-072-17 · NHTSA communication 10188495 · issued Nov 28, 2017
Technical service bulletin
communication type
Electrical System
component
2016–2018
model years
3
vehicle entries
Official summary
If you receive a customer complaint of a Check Engine Light on with a DTC P0401 stored in memory, follow the repair procedure below.
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.