Acura TLX 2021–2022 — technical service bulletin
Bulletin B21-007 · NHTSA communication 10222078 · issued Sep 22, 2022
Technical service bulletin
communication type
Engine and Engine Cooling
component
2021–2022
model years
2
vehicle entries
Official summary
"Service Bulletin - The MIL comes on with DTC P0455 (Evaporative Emission [EVAP] System Very Large Leak Detected) stored. The fuel main flap unit may have stuck open, causing a DTC to set."
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.