Nissan Frontier 2001–2002 — technical service bulletin
Bulletin NTB02034 · NHTSA communication 631337 · issued Mar 25, 2002
Technical service bulletin
communication type
Unknown OR Other
component
2001–2002
model years
2
vehicle entries
Official summary
Subject regarding malfunction indicator lamp illuminated with diagnostic trouble code p0420. *jg
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.