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Old 01-24-2011, 4:48 PM   #1
gsvette
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Amber Brake System light on

Hi, I have a 2008 RDX non tech. On the last few extremely cold morning the amber brake system light came on and stayed on. I checked the owners manual and it said in extreme cold weather this may happen. It said to pump the brakes before you put the car in gear.
I did this and the light never went out. So I shut the car off and then restarted it, the light went out.
Any one else have this problem?
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Old 01-24-2011, 5:49 PM   #2
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can't say that I have and i don't live in cold weather... makes sense though, if it's like super cold especially if you may be a little low on fluid.
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Old 01-25-2011, 12:57 PM   #3
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Same thing happened to us last week when the temps were in the -20s. The light came on a few times then but we didn't notice any problems with braking and the light hasn't come on since.
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Old 01-27-2011, 2:29 PM   #4
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Like many newer cars, the RDX has an electric vacuum pump for the brake system. The amber brake light indicates low vacuum, which isn't too unusual in very cold temps -- the pump should catch up after a short time. (If it stays on of course, get it checked.)

The red brake light indicates low brake fluid. This can be simply from pad wear, but it can also be a serious braking problem. Red should get your attention right away.
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Old 01-27-2011, 2:47 PM   #5
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Thanks XLR8R, It stayed on while I drove on the 2 extremely cold mornings (6 degrees one day and below 0 the other time).
But as the temps. have warmed a bit I have Not seen the amber light come back on. I will check with my scanner sometime and see if it set a code!
Just wasn't sure if I should take it back to the dealer while under warranty!
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Old 01-24-2014, 9:00 AM   #6
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i have this problem whenever i leave work and the temp is low (1 degree, etc). i never have this problem when i leave my nice warm garage at home.
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Old 02-17-2014, 2:10 AM   #7
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It's nothing to worry about its cause the electronic brake system is outside and it doesn't like cold weather there's just not enough voltage when it's cold but when it warms up the light goes out there's really no fix for it
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Old 02-17-2014, 6:25 AM   #8
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Its a small seal that could be changed. It only happens on really cold days happened to me.
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Old 04-06-2014, 3:46 PM   #9
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ah good to know. i kinda thought it was only cold-weather related.
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Old 04-06-2014, 9:05 PM   #10
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Its a small seal that could be changed. ...
What seal?
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Old 04-07-2014, 8:12 AM   #11
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Same thing happen to me on my 08 RDX when the temps were below freezing in the single digits and the car was parked outside overnight. The amber brake light stayed on until the temps warmed up above 40 degrees. Acura said it was a failed brake booster sensor and it was replaced for $250 parts/labor. No problems after +2 years; but, temps haven't been that low during since.
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Old 04-08-2014, 12:09 AM   #12
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It's the tire pressure being low due to the freezing temp. It disappears or should once you drive or when it warms up.

Had the same thing one morning with all my dash lights lit up and the car just barely started in -30 degree celsius weather in Canada. Tire pressure dipped from the normal 210-220 down to 180-190 psi.
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Old 04-08-2014, 4:32 PM   #13
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Originally Posted by EscaBoi View Post
It's the tire pressure being low due to the freezing temp. It disappears or should once you drive or when it warms up.

Had the same thing one morning with all my dash lights lit up and the car just barely started in -30 degree celsius weather in Canada. Tire pressure dipped from the normal 210-220 down to 180-190 psi.
The tire pressure low light and the brake light are two different lights. And they are not related with each other. The only thing in common is that they both may (or may not) appear during cold days.
BTW, to prevent the low tire pressure light on you just need to pump more air into your tires when temp. drops below -5 C. It will also improve your car's handling and gas consumption.

P.S. And the lowest temp in the GTA during last 5 years was only -22 C.

Last edited by protoRDX; 04-08-2014 at 4:41 PM.
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Old 04-16-2014, 5:30 PM   #14
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Have an 09 base and have gotten a few amber brake system lights over the past few weeks. These have all been momentary lights lasting only a few seconds,. weather has been warm. Over the past 3 days on my way to and from work my dash has lit up like a Christmas tree and the car has what I can describe as a hiccup in power then all is well. These episodes last less than a second then all is back to normal.... any ideas?
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Old 04-17-2014, 10:59 AM   #15
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Electrical gremlins can be the hardest things to diagnose. I can only suggest checking all connections, maybe starting with the ECU and the instrument cluster (assuming nothing else is happening other than flashing lights in the dash).
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Old 04-17-2014, 10:59 AM
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