Buick Encore 2013–2015 — technical service bulletin
Bulletin 19NA057 · NHTSA communication 10173390 · issued Feb 19, 2020
Technical service bulletin
communication type
Equipment
component
2013–2015
model years
6
vehicle entries
Official summary
This Technical bulletin provides a procedure for dealers/technicians to correct a condition of Malfunction Indicator Lamp (MIL) Illuminated, DTC P0420 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.