Honda Accord 2018–2021 — technical service bulletin
Bulletin A21-052 · NHTSA communication 10196776 · issued Jun 3, 2021
Technical service bulletin
communication type
Engine and Engine Cooling
component
2018–2021
model years
4
vehicle entries
Official summary
Service Bulletin - The MIL is flashing with a loss of power.
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.