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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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.
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!
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
__________________ 2009 Silver RDX w/o tech: safety wired magnetic Engine oil drain plug | safety wired Oil Filter | safety wired Transfer Case drain/ fill plugs | safety wired Transmission drain plug | Red Line D4/Racing (1:1 mix) ATF | MagneFine magnetic filter in Trans cooler line | MagneFine magnetic filter in Power Steering line | safety wired OEM Radiator drain plug | safety wired rear Differential drain/ fill plugs | Red Line D4 ATF in rear Differential.
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.
Son (handed down for his 16th B-day) - 06 TSX 5AT w/ Navi, Carbon Gray w/ Quartz
His - 08 RDX Tech, Moroccan Red Pearl w/ Taupe
Her - 11 MDX Adv/Ent, Palladium Metallic w/ Ebony
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.
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?
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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