02 WRX check engine light on/blinking?!

View Poll Results: Based on all information given what do YOU think is causing the misfire(s)??

Voters
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  • Spark Plug (Bad/Improper gap)

    8 33.33%
  • Coil Pack (Bad/Replace)

    4 16.67%
  • Injector (Faulty/Fuel pressure bad)

    6 25.00%
  • Vacuum Leak

    3 12.50%
  • Compression (Bad/low compression)

    1 4.17%
  • Valve Issue (Poor seating/bad condition/Leakdown Test)

    2 8.33%
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This is a discussion on 02 WRX check engine light on/blinking?! within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; ::EDIT:: POLL ADDED SEE IF YOU CAN GUESS RIGHT!!! Hey guys just became the owner of a 2002 WRX Sedan ...

  1. #1
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    Exclamation 02 WRX check engine light on/blinking?! [::EDIT:: Poll Added Test Ur Skills]

    ::EDIT:: POLL ADDED SEE IF YOU CAN GUESS RIGHT!!!


    Hey guys just became the owner of a 2002 WRX Sedan which I have always wanted since they first hit the streets! So finally got around to getting one and everything seemed fine then when I tried to give it a little push (NOT lets see everything you got kinda push!!) and the check engine light came on and started blinking and the car jerked a little bit... Then the check engine light stayed on now Anyone have any idea what that might mean? It also does not seem to happen every time but def only happens when I try to give her a little go.. Thanks anyone who might have some information!
    Last edited by Clarkiss; 03-07-2014 at 08:34 AM.

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    Sammich Makin' Pwincess wrxtreme06's Avatar
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    We can't tell what it means without knowing the code associated with it. Do you have an accessport or obdII scanner? If not you'll need to go to autozone or any local parts store to have the code read

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    Thanks "wrxtreme" for the fast response! btw I dig the user name Ok I have something I bought from walmart like 2 years ago for $100 that plugs into cars and can read codes and run tests I think its been a while since I played with it.. Im going to get to work getting that code then im going to reply letting you know what I come up with

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    Ok turns out I still had my "CanOBD2 Diag Tool" just got done plugging into my WRX and there are actually 2 codes...

    P0301 - Cylinder 1 Misfire Detected

    P0302 - Cylinder 2 Misfire Detected

  6. #5
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    02 WRX check engine light on/blinking?!

    Quote Originally Posted by Clarkiss View Post
    Ok turns out I still had my "CanOBD2 Diag Tool" just got done plugging into my WRX and there are actually 2 codes...

    P0301 - Cylinder 1 Misfire Detected

    P0302 - Cylinder 2 Misfire Detected
    Gah....these codes suck because it's really hard to figure out what is actually wrong. Go ahead and list all the mods done to the car. Get a compression test done as well if you can. There is a thread somewhere on here that deals with misfire codes and how to track down the actual problem. Let's just hope you didn't inherit someone else's problems :/
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    Thanks guys for the info.. I did find one or two threads about if you have a misfire code and figured it to be or hoping it to be bad spark plugs or coil packs.. I have a 30 day warranty on the car that included the engine so im going to give the dealer a call or stop in with the codes I pulled and go from there. That's prob the best route to take right?

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    If you have a warranty, definitely. Not your problem!
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  10. #9
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    Flashing means a "large variance misfire" or a misfire that is severe enough to potentially damage the catalytic converter.

    I've had the issue in the past, which turned out to be a faulty injector.
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    Quote Originally Posted by zax View Post
    Flashing means a "large variance misfire" or a misfire that is severe enough to potentially damage the catalytic converter.

    I've had the issue in the past, which turned out to be a faulty injector.

    Exactly the kind of information I was after "Zax"! Thanks so much for taking the time to read and enlighten me on the subject From what I have found and been reading these codes seem to be pretty common and not too costly to repair.. So today im going to call/stop up where I bought the car from and have them get to work on correcting it! Definitely a huge help knowing what the codes mean and a idea on what parts may need replacing thanks to this community! THANKS EVERYONE who dropped some knowledge about the subject and as a new member here I had a great first experience in the community and look forward to starting this new little hobby/project with you awesome people!

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    Quote Originally Posted by Clarkiss View Post
    these codes seem to be pretty common and not too costly to repair
    Honestly, that's a very general statement. The issue could be due to a major vac leak (which can be very cheap to fix) or due to poor valve-seating (very expensive to replace). It's your job to systematically eliminate the less-costly fixes.

    I'd start by changing your spark plugs with proper-gapped stock heat range plugs. If the problem persists, I'd check the motor for vacuum leaks. Next, perform a leakdown test to ensure the valves are in good condition. Then start checking your injectors and fuel pressure.
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    Quote Originally Posted by zax View Post
    Honestly, that's a very general statement.

    I know I understand your not saying or pointing out any one thing to be the cause.. Just giving me a idea of what might be causing the issue and I thank you much for that! After I drop it off to have it looked at I will be posting to let you guys know what happens

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    So I have not been able to link up with the mechanic yet at the place I bought my wrx from because of the snow we just had so we are looking like the end of this week prob like Friday till they check it out Figured I'd post some more info to help narrow this misfire issue down.. So I been driving for almost a week now since this issue first started and as long as I keep the RPMs down under 4500-5000 while driving everything is fine no rough combustion no check engine light all seems to be well.. Then when I try to give her a little extra at about 2nd or 3rd gear around 4000-5000 RPMs the misfires happen! Check engine light comes on and blinks for a few secs then goes solid.. Now at first it gave me codes for cylinder 1 and 2 misfire which was a few days ago so I cleared them and put some fuel injector cleaner in the car 2 times now.. Now yesterday after driving it around for a day or two with no issues taking it easy I pulled up behind a little yellow GTI and decided to see what happens this time.. so we start going and of course right at I think 2nd gear 4000-5000 RPMs the car loses some power and the check engine light comes on doing its normal blinking then goes solid so I check it out to make sure its not a different code or anything and this time its just detecting a misfire only on cylinder 1... So I'm wondering if anyone has any idea or a educated guess as to what might be causing the misfire? Since the car runs completely fine when I'm driving it normally and only experiences misfires when I try to drive it like the WRX it is lol...

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    Any ideas at all anyone? Basically the car runs fine NO misfires when I pretty much baby it which I find is weird because u would figure what ever is causing the misfire to happen would be doing it even when im not trying to drive it like a wrx... So it only misfires when I try to see what shes got so to speak..

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    YAY Just got done dropping off my baby at the shop where I bought her from.. And the guy that sold her to me even gave me his car to use for a couple hours while they have her there so I thought that was very generous of him don't ya's think!?

    Anyway I got a little idea since im board while I wait for the call I figured I'd start a poll and list a few things that are most likely causing the misfires and everyone can make their educated guess as to what they think the problem is.. And when they call me when my cars done I will post which answer was correct and you will know if you're a jabroni or not

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