Infiniti QX56 2004 — technical service bulletin
Bulletin 04022 · NHTSA communication 10007681 · issued Aug 3, 2004
Technical service bulletin
communication type
Electrical System
component
2004
model years
1
vehicle entries
Official summary
Malfunction indicator lamp on with diagnostic trouble code p1278, p1279 a/f sensor b1 rich-lean / lean-rich response. *tt this bulletin replaces previous bulletin dated 05/15/04. *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.