Mil Illuminated Incorrectly

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Mazda Tribute, 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, and 2003 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: If MIL blinks at steady rate, misfire condition could possibly exist.

Check for emission related concern (DTCs are in PCM).
Check for short to ground circuit between MIL (located on instrument cluster) and PCM.