p0304

  1. F

    Help! P0304 code

    I drive an 03 Mazda Protege5, who has given me no problems. Last night, my check engine light started to flash and my engine had no power. I quickly got the codes (thank goodness for my Bluetooth OBDII reader) and got two codes - P0421 (I knew about that one) and P0304. From what I've looked up...
  2. V

    P0304 / P0300 in 2004 Mazda6S V6 (Manual)

    Hi, I bought a used Mazda6S V6 (manual transmission) with 97000 Mi. Before buying the car, I had AAA do a pre-purchase inspection. They found a few items - the valve cover gasket needed replacing, new engine mount, cracked boot. They assured me the engine seemed to be running fine and that...
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