WenmarOpen by Wenmar Pro

Service bulletin 0100301

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

The communication, as NHTSA indexes it (as of 2026-10-19)
TypeService bulletin
NHTSA id620007
Published by NHTSA2001-07-09
Manufacturer's number0100301
Manufacturer's date2001-02-28
NHTSA componentUNKNOWN OR OTHER

NHTSA's summary

SOME VEHICLES MAY EXHIBIT MALFUNCTION INDICATOR LAMP ILLUMINATION WITH DIAGNOSTIC TROUBLE CODE (DTC) P0420 / 0421 OR P0430 / 0431 STORED IN MEMORY WITH NO DRIVEABILITY CONCERNS PRESENT. THIS CONDITION MAY BE CAUSED BY AN OVERLY SENSITIVE REAR OXYGEN SENSOR(S), WHICH FASELY INDICATES AN EMISSIONS CONCERN AND A DTC TO BE STORED. *TT

The document

No address for NHTSA's copy can be built for this communication. Ask the dealer for it by the manufacturer's number.

Trouble codes named

P0420, P0430

Vehicles listed
MAZDA MILLENIA1997, 1998, 1999, 2000

Listing a model year does not mean every vehicle of it is concerned: the document says which.