Honda Fit 2015–2016 — technical service bulletin
Bulletin A18-027 · NHTSA communication 10133022 · issued Mar 16, 2018
Technical service bulletin
communication type
Fuel System, Gasoline
component
2015–2016
model years
2
vehicle entries
Official summary
Service bulletin - The MIL is on and DTC P0420 (catalyst system efficiency below threshold) is set. Faulty fuel injectors in one or more cylinders may be affecting combustion and causing a false DTC P0420.
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.