Mazda MAZDA3 2004–2009 — technical service bulletin
Bulletin SB-01-012-09 · NHTSA communication 10030349 · issued Apr 9, 2009
Technical service bulletin
communication type
Engine and Engine Cooling
component
2004–2009
model years
10
vehicle entries
Official summary
Mazda: mil comes on with p2004/check valve stuck open. Some vehicles may experience an mil that comes on with dtc p2004 (variable tumble shutter valve stuck open). The cause may be the check valve in the intake manifold vacuum chamber being stuck open. Check valve has now been updated. *pe
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.