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Old 07-21-2011, 04:26 PM   #1
noodles101
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check engine : brake circuit failure??

i got a check engine light...after i washed my car...

it says brake circuit failure??

but my brake lights perfectly fine at any position the light switch is at..

its a 1996 328is


weird. any1 know what the problem is?

not too worried because everything works okay. just the warning sign flashing at me everytime i start my car.....
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Old 07-21-2011, 04:37 PM   #2
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just run and drive the car and see after turning it on and of if it resets itself. Should be fine..ghost in the machine sort of thing.
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Old 07-21-2011, 05:45 PM   #3
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When you put on the brakes are your brake lights lighting up?
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Old 07-21-2011, 06:34 PM   #4
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yup . they both light up.
DRL , middle notch , and full low beams notch.

brake lights all light up and also comes on when i press on the brakes.

i'll take ceekers advice...and just wait it out
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Old 07-21-2011, 06:40 PM   #5
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your brake light switch is on it's way out it's not the check engine light tho brake light circuit come on the OBC check engine is a totally different ball game
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Old 07-21-2011, 06:50 PM   #6
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^^^what is a brake light switch......? is this thing gunna be a pain in the ass to change? ...
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Old 07-21-2011, 07:39 PM   #7
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no not at all it's under the drivers kick panal part is not expensive . where do u live?? maybe i can give u a hand if am in the area next week
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Old 07-21-2011, 09:00 PM   #8
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Quote:
Originally Posted by noodles101 View Post
^^^what is a brake light switch......? is this thing gunna be a pain in the ass to change? ...
Located behind the arm of the brake pedal. As you press down on the pedal it presses a plunger in; This plunger is part of the brake switch.
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I think I've had 14 bmw's in 4 years.
2 IX's -sold and parts
2 325i 4 dr - sold
4 318is all white - sold and parts
1 87 325is red - parts
1 89 325i vert grey - parts
1 90 325is white - keepin
1 87 325i vert -red - keepin
latest addition 1 88-325is red - parts
latest addition 1 89-325i vert - white -fixin/sold
latest addition 1 92-318i vert - blue - parts
latest addition 1 87 325is blk - parts.

latest addition as of 2013-Gold 87-325is auto! it's a keeper!
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Old 07-27-2011, 10:03 AM   #9
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I happen to have a brake light switch I never installed, cant return it so make me an offer
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Old 07-27-2011, 10:07 AM   #10
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http://www.pelicanparts.com/bmw/tech...ake_Switch.htm
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Old 07-27-2011, 08:34 PM   #11
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The brake switch isn't hard to replace but a major pain the ass to do.
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Old 07-28-2011, 09:11 AM   #12
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I just ordered 2 switches from E-bay as mine went for the second time. Common issue on these E36's... Dealer wants $56 for the switch...
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Old 07-28-2011, 02:23 PM   #13
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www.autopartsway.ca I believe it is $12. OEM
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Old 07-28-2011, 02:32 PM   #14
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Just checked, $25
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Old 07-28-2011, 07:58 PM   #15
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ya ....i thought i was lucky because the warning went off for a week or two...
but it came back again today....i guesss i'll have to change thisss...lol but i have no idea where it is or how to change this..LOL ..
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