Nissan Altima 2019–2022 — technical service bulletin
Bulletin NTB22-097 · NHTSA communication 10226132 · issued Nov 4, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2019–2022
model years
4
vehicle entries
Official summary
DTC P0404 STORED IN THE ECM AT TEMPERATURES BELOW 32°F IF YOU CONFIRM DTC P0404 (EGR A CONTROL) is stored in the ECM at temperatures below 32°F. ACTION 1. Confirm the current ECM part number. 2. Reprogram the ECM, if applicable.
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.