Acura TLX 2015–2019 — technical service bulletin
Bulletin BPaS11052018904 · NHTSA communication 10149656 · issued Nov 5, 2018
Technical service bulletin
communication type
Engine and Engine Cooling
component
2015–2019
model years
5
vehicle entries
Official summary
Dealer message - American Honda Motor Co., Inc. (AHM) is investigating certain 2015-2019 TLXs with a client complaint of the Malfunction Indicator Lamp (MIL) on with DTC P0420 (Rear Bank Catalyst System Efficiency Below Threshold [Bank 2]) and/or P0430 (Front Bank Catalyst Sytem Efficiency Below Threshold [Bank 2]) stored. To fully understand the cause of this condition, AHM would like to inspect the vehicle prior to you attempting a repair of any kind.
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.