Honda Accord 2018–2022 — technical service bulletin
Bulletin A23-026 · NHTSA communication 11000139 · issued May 2, 2024
Technical service bulletin
communication type
Engine
component
2018–2022
model years
5
vehicle entries
Official summary
Service Bulletin - During engine start in cold conditions, a miscalculation in the PCM causes the air-fuel ratio to exceed DTC rich criteria, resulting in the vehicle experiencing drivability concerns. This issue is most common in regions with cold weather.
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.