check engine light problem with 2003 wrx
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This is a discussion on check engine light problem with 2003 wrx within the Interior Mods forums, part of the Tech & Modifying & General Repairs category; Like the title states I'm having a check engine light problem. It doesn't come on with the key turned to ...

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    check engine light problem with 2003 wrx

    Like the title states I'm having a check engine light problem. It doesn't come on with the key turned to the on position with the other idiot lights, and doesn't come on when there's a code. I looked at the bulb and it seems to be blown. But the bulb is soldered to the board. Does anyone know what type of bulb it is and where to find it?

    My car is a 2003 wrx

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    Moderator Donkey's Avatar
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    It shouldn't be soldered. Should be in a twist in/out base. Bulb should be a "74". Sometimes they can be found at the autostores. If not candlepower.com might have them.
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    i figured it would be a twist bulb also. but its not.




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    Moderator Donkey's Avatar
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    check engine light problem with 2003 wrx

    Huh. Right on the board it is seeming to indicate it is a LED "74" style bulb. Look to the right of your finger right above "check engine"
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    Yeah. It's there. But like I said its soldered to the board. I was wondering if anyone had the cel not work and how did they go about replacing it.

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    He simply abides. SD_GR's Avatar
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    Have you measured impedance across the solder points? I'd suspect a cold solder before I suspected a failed LED in any case, so I'd try carefully to warm up the solder points and make sure they're even and OK first. Disclaimer: If you follow my advice you do so at your own risk; I am not responsible for any damage to any object or person within a 100 km radius should you chose to do this.
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    No I haven't tried that yet. I guess just measure the ohms?

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    Quote Originally Posted by mofeel View Post
    No I haven't tried that yet. I guess just measure the ohms?
    I would suppose so. The object would be to determine quickly whether you are looking at a fault with the LED and/or its connections rather than a fault with the signal from the ECU. The latter is less likely IMO but it's free to check. To compare, find another LED on the circuit that you know works and measure across those solders for reference.
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    Ok. I'll get a multi meter and test it. Then report back.

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    Now that I think of it, we're assuming it's an LED therefore a diode. To test, a multimeter will have a diode function where the meter itself supplies voltage and you look for light. See YouTube for videos and you'll see what I mean.
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    I lied. I cheated. I bribed men to cover the crimes of other men. I am an accessory to murder. But the most damning thing of all... I think I can live with it. And if I had to do it all over again - I would. Benjamin Sisko
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    ok. i dont think mine has that function. ill look for one today.

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