Question about 2002 Mazda Protege

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Obd2 code p0300 on mazda protege 2002

Obd2 code p0300 on mazda protege 2002

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  • Anonymous Mar 17, 2014

    P0300 error on 2002 mazda protege


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Just had one of these with a maxima, the code is multiple random misfire, when a misfire occurs, to start is do the basics, replace the plugs, check fuel pressure, clean throttle body, and coolant is topped up. also I have seen if the O2 sensor is not working correctly is can cause a misfire, you will need a scan tool to look at what the O2 sensor is doing, o rby back probing the sensor (don't damage the O2 sensor wires). If it wires replace them as well, if it has coils they usually dont give that code if one fails, it will pinpoint that a certain coil if one fals.

Posted on Oct 02, 2009

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Posted on Jan 02, 2017

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I have a 2002 mazda protege lx giving a P0300 code. scanner also says fuel system OL-fault, what do I need to look at?

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What is the difference between the check engine light being on and it flashing on a 2002 Mazda Protege? Is there any? The light has been on for nearly 3 years on and off. Every time it is fixed the light...

It's getting angry now. I wouldn't ignore it for fear of getting stranded. If you live in the US, you can get a free OBD2 scan at your local parts chain. Not sure what you mean by "every time it is fixed", as the light would not come back on if the issue was properly addressed in the repair. You may be depending on poorly trained mechanics. Write down the OBD2 trouble codes and send to us for advice on what to do.
Thanks for using FixYa.

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