Infiniti QX4 2001 — technical service bulletin
Bulletin ITB02050 · NHTSA communication 635641 · issued Sep 1, 2002
Technical service bulletin
communication type
Unknown OR Other
component
2001
model years
1
vehicle entries
Official summary
Some vehicles may exhibit a malfunction indicator lamp on and either or both diagnostic trouble code p0420 / p0430 bank-1 / bank-2 catalyst stored. *tt
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.