Warning Lights
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This is a discussion on Warning Lights within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; I just brought my car into Subaru to have my car looked at because of three warning lights that have ...

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    Warning Lights

    I just brought my car into Subaru to have my car looked at because of three warning lights that have been lit up on my dash for the past couple days. The three lights are the Vehicle Dynamics Control warning light, the ABS warning light, and the Hill start assist warning light. I have a 2010 WRX with 19,000 miles. The dealer has just informed me that my VDC module needs to be replaced. Has anybody had this problem before? I find it strange as though I've only had the car for 10 months now and the last thing I need right now is car problems (though this should be covered by warranty). Let me know what you guys think! Thanks, Jon

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    I guess no one has had this problem...I got my car back from the dealership last Wednesday and then last night driving home from work the three warning lights went back on. I guess it wasn't a faulty VDC control module - apparently something else is causing this problem. Any ideas??

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    Registered User jd92677's Avatar
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    I wonder if you have a bad ABS/wheel speed sensor? All three of those systems use wheel speed data.
    Stink eye mob #727
    2011 WRX DGM Hatch, Protuned Stage 1

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    Hmm...that's a possibility. I'll bring it up to the mechanic at Subaru Monday AM. Thanks!

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    Just heard back from dealer - they said the brake light switch needs to be replaced.

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    Registered User jd92677's Avatar
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    Quote Originally Posted by JonnyTurbo View Post
    Just heard back from dealer - they said the brake light switch needs to be replaced.
    Did your brake lights not work either? That sounds a little iffey to me but I guess anything is possible.
    Stink eye mob #727
    2011 WRX DGM Hatch, Protuned Stage 1

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    My brake lights were working fine. I agree it sounds a little strange.

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    Registered User jd92677's Avatar
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    Then I don't know that I'm buying that. As far as I know, the brake switch is a simple on-off switch and if the brake lights work, the switch is working properly. Let us know if it fixes the problem, I'm always up for learning something new!
    Stink eye mob #727
    2011 WRX DGM Hatch, Protuned Stage 1

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    I reiterated to the tech that my brake lights were working fine and he said a defective brake light switch might or might not effect the brake lights. The new brake light switch should be coming in Wednesday.

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    Registered User djclue8713's Avatar
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    Just wanted to bring this topic back up to speed. I took my car to the dealer 2 weeks ago for this very same issue. The 3 lights come on when I brake somewhat harder than normal. The lights will disappear after restarting the vehicle. Of course the dealer couldn't reproduce the problem but a brake light switch code was found stored in the computer. They "adjusted" the switch to keep it from sticking and was supposedly fixed. Well, since I've had it looked at it hasn't been occurring as often, but it still bugs me. I will be bringing this up again when I go to get my winter tires mounted in 2 weeks.

  12. #11
    Registered User Scottyb0119's Avatar
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    Im in the same boat it happend once or twice when I first got the car, and now today makes it the second day in a row at 11,100 miles

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    Registered User djclue8713's Avatar
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    Yea it's pretty annoying. I dug around and found the sheet from my visit. This is what it said:

    Customer states ABS, Hill Assist & Trac Lights all come on when stopping. No active fault present. VDC has code C0054 Brake Light Switch Off malfunction. No fault found with circuit. Possible very intermittent switch stick, but could not verify. Adjusted switch.
    Like I said in my earlier post though, since they fixed it, the lights have come on a few times...

    Maybe you'll have better luck when taking it in!

  14. #13
    Registered User djclue8713's Avatar
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    Update: Took my car to my sales dealer who said they've seen this on a few 11's. Looks like the third time was the charm. They replaced the switch and it's all set.

    Customer states that when braking the ABS, VDC and Hill Assist lights come on intermittently. Diagnostic results in found codes C0054 and C0857. Found bad switch. Replaced switch. Test all ok.
    No more annoying lights!
    Last edited by djclue8713; 12-05-2011 at 03:40 PM.

  15. #14
    Registered User Scottyb0119's Avatar
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    I had the switch replaced twice, the second time it still failed shortly after leaving the dealership. The position the dealership installed the switch at allowed me to slow the car down just a little bit before the lights would come on, so my theory is the ABS computer was seeing brake pressure but since it didn't see the switch as being open it would throw the lights for the abs hill assist and VDC. So I took it upon myself to adjust the switch so the brake lights come on as soon as you touch the pedal, I havent had any problems since.

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    I just did a 360km drive in my 2011 WRX and I had 3 different lights come on at once too; engine check light, VDC light (both stay on) and the cruise control light flashes. I am taking the rex into Subaru tommorrow and hopefully they can look at it but I have no idea what it is. Needless to say the engine check light alone was cause for concern...
    Roses are Red, My Rex is Blue...

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