Infiniti QX4 2001 — technical service bulletin
Bulletin 02050A · NHTSA communication 10001024 · issued Jan 22, 2003
Technical service bulletin
communication type
Electrical System
component
2001
model years
1
vehicle entries
Official summary
Malfunction indicator lamp on with 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.