Mazda CX-5 2018–2019 — technical service bulletin
Bulletin 01-004-22 · NHTSA communication 10213183 · issued May 13, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2019
model years
2
vehicle entries
Official summary
Some customers may experience the CHECK ENGINE light ON at idle with DTC P22FB:00 [DCU] and P1640:00 [PCM] stored in memory. *P22FB:00 [DCU]: NOx sensor No.1: On-board diagnostics canceled *P1640:00 [PCM]: Powertrain DTCs available in dosing control unit This is caused by a false malfunction detection occurring under certain conditions. To eliminate this concern, the detection condition of DTC P22FB:00 has been changed.
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.