Flashing preheat glowplug dashboard light...

[g8dhe]

When the glowplug light flashes as opposed to a steady on, then it means the ECU is reporting a fault, the lamp will stop flashing if the fault disappears or is intermittent, use this site for getting the precise error code http://www.philmcfadden.co.uk/MazdaDiagnosticBox.htm