Mazda MAZDA3 2010–2013 — technical service bulletin
Bulletin 01-021-13-2817B · NHTSA communication 10097749 · issued Sep 5, 2013
Technical service bulletin
communication type
Equipment
component
2010–2013
model years
5
vehicle entries
Official summary
Some vehicles may experience the mil on with dtc p0128:00 (thermostat stuck open). This concern is caused by improper control logic of the pcm. To correct the problem, the control logic of the pcm has been changed.
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.