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Old 12-14-2017, 05:12 PM   #1
Semi Cole
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Any idea what could be wrong with my car?

I made a post with a video over on Reddit, here: https://www.reddit.com/r/GolfGTI/com...ning_any_idea/

Any ideas what the issue could be?
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Old 12-14-2017, 05:15 PM   #2
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looks like it's the brakes.

just a thought, but if my car has 40k miles on it (it's difficult to see due to the quality of the video) and i'm getting warnings on the dash for "brakes" on a car that has wear sensors on the pads....maybe that's a good spot to start?
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Old 12-14-2017, 05:21 PM   #3
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You need a new battery


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Old 12-14-2017, 05:40 PM   #4
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Originally Posted by armedferret View Post
looks like it's the brakes.

just a thought, but if my car has 40k miles on it (it's difficult to see due to the quality of the video) and i'm getting warnings on the dash for "brakes" on a car that has wear sensors on the pads....maybe that's a good spot to start?
Nah it's not the brakes, just had it serviced at 40k and brakes still had plenty of life in them. Think that brake warning is just a symptom of whatever is wrong.
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Old 12-14-2017, 05:41 PM   #5
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You need a new battery


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I tested the battery this morning and got right around 12v. All the lights and instruments are working fine as well, so I wasn't sure if it was the battery, but that was my hunch as well.
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Old 12-14-2017, 05:50 PM   #6
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Quote:
Originally Posted by Semi Cole View Post
I tested the battery this morning and got right around 12v. All the lights and instruments are working fine as well, so I wasn't sure if it was the battery, but that was my hunch as well.
Yup battery...12v even is a little low
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Old 12-14-2017, 06:07 PM   #7
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As others have said, its the battery. With everything in the new cars based on electronic sensors, when the battery starts to die, the cars go haywire.

As an extreme example, in my 2001 E46 BMW my battery started to die while I was driving down the road. I got a transmission error and the car refused to shift out of 2nd gear. My brake wear sensors blinked, and the parking brake light kept flashing. I had to drive 10 miles in 2nd gear... it was not pleasant.

Replaced the battery and all was good.
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Old 12-14-2017, 06:10 PM   #8
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Yeah BMW's are notorious for this when the battery needs to be replaced


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Old 12-14-2017, 06:14 PM   #9
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Texas=heat=poor battery life.

As said, 12V is low. My Saab won't even bother trying to crank at 12V.
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Old 12-14-2017, 06:20 PM   #10
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Cool, thanks everyone. Looks like I'm gonna be going for a new battery once the wife gets home.
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Old 12-14-2017, 06:40 PM   #11
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12 volts is VERY low.
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(Mostly) Posted by Josh/AWE. Flapper valves are open at idle, close after 1100 RPM during part throttle. Full throttle 1st-4th gear the valves open until throttle let off. 4th gear, 1500 RPM to full throttle closed, closed until 3500 RPM, then open until lift off throttle.
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Old 12-14-2017, 07:00 PM   #12
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12 volts is VERY low.
From the few sources I checked online, 12.6 is a normal reading when the car is off, so I didn't think it was extremely low.
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Old 12-14-2017, 07:09 PM   #13
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Quote:
Originally Posted by Semi Cole View Post
From the few sources I checked online, 12.6 is a normal reading when the car is off, so I didn't think it was extremely low.
https://forums.anandtech.com/threads...y-car.2349895/

Quick google search and good discussion explaining it.
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Old 12-14-2017, 07:16 PM   #14
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Quote:
Originally Posted by Diggs24 View Post
https://forums.anandtech.com/threads...y-car.2349895/

Quick google search and good discussion explaining it.
2) A known-good battery is "dead" at 12.0 volts and fully charged at 12.6 volts.
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(Mostly) Posted by Josh/AWE. Flapper valves are open at idle, close after 1100 RPM during part throttle. Full throttle 1st-4th gear the valves open until throttle let off. 4th gear, 1500 RPM to full throttle closed, closed until 3500 RPM, then open until lift off throttle.
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Old 12-14-2017, 11:09 PM   #15
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Definitely the batteries. With Accessory ON, you read 12 which is enough to keep the dash lights and others happy.

But when you crank the engine, due to the starter load, the voltage gets pulled down to 8 volts or lower. Low enough to make the dashboard lights and controllers to go nuts., hence the infamous clicking sound and the christmas light show.
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Old 12-15-2017, 01:24 AM   #16
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It's getting in the holiday mood by lighting up like a Christmas tree for you.
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Old 12-15-2017, 01:36 AM   #17
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I always plug in this on the lighter socket. Older Audiz used to have a battery gauge on the dashboard, used to be handy in these situations.

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