Question about 2003 Mazda Protege

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I have a 2003 mazda protege --computer reads random/multiple cyclinder misfire. what am I looking for?

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  • 4 Answers

Idk if you already checked this but when I have a similar problem one of my spark plugs has gone bad.

Posted on Jan 15, 2013

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Posted on Jan 02, 2017

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SOURCE: Blown main fuse on 2003 mazda protege 5.

There are two bolts on the side of the fuse itself. Under the fuse box on each side. Unbolt those and it will come out.

Posted on Dec 23, 2008

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SOURCE: how to replace an alternator belt on a 2003 mazda

Hi there...my name is Keith..and yes..you will have to take the surpentine belt off..and it no fun..but thats just what you will have to do..im sorry..and it will take some fussin and cussin ..or take it to a shop..im sorry i dont have a better outlook..and if you need further assistance..write me back

Posted on Jun 29, 2009

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SOURCE: where is the computer in2002 mazda protege es

Generally, the PCM (computer) is located under the passenger-side floor slope, under a metal frame. You may want to remove the passenger-side kick plate plastic and peel back some of the carpet to revel it.

I hope this helps! :)

Posted on Sep 01, 2009

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SOURCE: 2001 mazda protege keeps stalling

my 2001 mazda protege starts hard, idles low and high at various times (never normal) and it acts as though its going to stall at all times. sparks and wires are changed no help, changed air filter no help. any idea on what to do?

Posted on Nov 26, 2009

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SOURCE: 2003 Mazda Thermastat

I had the same problem a couple of years ago. It is actually located on the bottom of the engine. I have no clue why. They are usually located on the top for easy access. Follow the hose coming from the bottom of the radiator to the engine block.

Posted on Dec 16, 2009

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5 engine light came on took it and hooked it up to a tester it read po 300 random misfire also po660 intake manifold tuning valves control circuit


Hi there:

A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.


A code P0300 may mean that one or more of the following has happened:
Faulty spark plugs or wires
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector(s)
Burned exhaust valve
Faulty catalytic converter(s)
Stuck/blocked EGR valve / passages
Faulty camshaft position sensor
Defective computer


Possible Solutions: If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.


If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.


Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.




Now, about P0660, check diagnostic test HERE.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Jul 25, 2012 | Cars & Trucks

2 Answers

I have a 01 mazda protege. When im driving, it acts like it wants to cut off for a second then drive fine for a while. Also cut off at a stoplight.


check the fuel filter for clogging up. if a fuel filter gets bad it will lack power and it will stall at stops. when starting engine up, the debris is on bottom of filter. as you drive, if its bad it will continue to plug up.

Jan 17, 2012 | 2002 Mazda Protege

1 Answer

What is Imcc for Mazda?


P0300 random cylinder misfire.
p0421.
P0660 IMCC.
HOW CAN I FIX AND WHAT I NEED TO FIX PROBLEM.?THANK YOU.

Sep 03, 2011 | 2002 Mazda Protege

2 Answers

I have a mazda protege 2003 and my car stinks like rotten eggs when i put on the gas and on top of that, my engine light is blinking and my car shakes when i stop at a red light!


i have a 2003 mazda protege. this is the third time my check engine light has come on. the first time the car started to shake when i stopped at a light and the check engine light came on. i had a readout done and it said misfire. i took it to a garage and they changed my spark plugs and wires. 2 weeks later it came on again and my car started to shake whenever i stopped. readout said misfire. they fixed the coils. it has been 2 weeks since then and my car started shaking again whenever i stop and the light came on. what could possibly be wrong with it?

Feb 06, 2010 | 2003 Mazda Protege

1 Answer

Obd2 code p0300 on mazda protege 2002


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.

Oct 02, 2009 | 2002 Mazda Protege

1 Answer

Engine light code P0300


I would recommend going back with ac/delco platinum plugs.Some of these "high performance" plugs dont work well in newer gm vehicles.The computer is sensing more than one cylinder misfiring and cant determine the cylinders the style of plug your using could very well be causing this

Sep 03, 2008 | 2001 Chevrolet Corvette

1 Answer

Po300 multiple cylinder misfire po705 transfer case circuit malfunction


Check the EGR valve. Replacing the EGR valve fixed my error code for misfiring. I also had to remove the battery cable for 5 minutes to turn off the check engine light.

Jun 11, 2008 | 2002 Mazda Protege

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