Honda Civic 2003–2005 — technical service bulletin
Bulletin 05028 · NHTSA communication 10017632 · issued Aug 13, 2005
Technical service bulletin
communication type
Electrical System
component
2003–2005
model years
3
vehicle entries
Official summary
Product update: ecm update to prevent catalyst dtc p0420 and/or vps dtc p1021, mcm update to current specifications. *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.