WARNING check Brakes - Hyundai Ioniq Forum
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post #1 of 28 (permalink) Old 15-05-19, 09:34 AM Thread Starter
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WARNING check Brakes

Just the had all the bells ringing and dashboard lights flashing Warning check brakes light up at power up.

And yes, there were no brakes!

Fortunately I was just dropping mother in law off at home next door but one so I crawled round to mine very carefully.

Regen paddles and handbrake didnít work either.

Hyundai assist (AA) came out and of course no problems at power up!

Diag reports:

Patrol found the following fault code/s:System : Driver assistance system - V09 / Camera system 4.0C162587 - CAN communication with ABS/ESP control units. Error Message : Missing message.road test car all seems ok read codes and remove codes re road test and no codes came back mbr tested car and he seems ok no faults

Suggests take it to the dealer for further tests

Anyone had this?

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post #2 of 28 (permalink) Old 15-05-19, 01:04 PM
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I guess it's not the same issue as yours.
From time to time I get the brake warning though the brakes remain OK . I find that I have to top up the brake fluid every 5 or 6000 miles for some reason , though the dealer can't explain it .

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post #3 of 28 (permalink) Old 15-05-19, 01:49 PM
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I guess it's not the same issue as yours.
From time to time I get the brake warning though the brakes remain OK . I find that I have to top up the brake fluid every 5 or 6000 miles for some reason , though the dealer can't explain it .
If you need to top up brake fluid regularly there IS something wrong. If the dealer can't explain maybe he should refer it to Hyundai because minor brake fluid losses can quickly escalate.

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post #4 of 28 (permalink) Old 15-05-19, 02:23 PM Thread Starter
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I found the brake pedal virtually wouldnít depress at all.

Been out in it since. No problem.

Probably dodgy sensor or low voltage somewhere.

Iíve emailed the AA report to the dealer.

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post #5 of 28 (permalink) Old 15-05-19, 02:47 PM
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Ok, now I'm worried...

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post #6 of 28 (permalink) Old 15-05-19, 02:52 PM
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If you need to top up brake fluid regularly there IS something wrong. If the dealer can't explain maybe he should refer it to Hyundai because minor brake fluid losses can quickly escalate.
Been like it since I've had the car . Just doesn't seem to like being half way between max and min on the reservoir

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post #7 of 28 (permalink) Old 15-05-19, 02:55 PM
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I have never had to top up brake fluid on any car I've ever owned..

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post #8 of 28 (permalink) Old 15-05-19, 02:58 PM
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I have never had to top up brake fluid on any car I've ever owned..
This is the only one for me too ( apart from a fractured brake pipe once ) . There's no leaks on my Ioniq / It's a mystery ,but not one that worries me

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post #9 of 28 (permalink) Old 16-05-19, 04:35 AM
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I guess it's not the same issue as yours.
From time to time I get the brake warning though the brakes remain OK . I find that I have to top up the brake fluid every 5 or 6000 miles for some reason , though the dealer can't explain it .
You have a leak in the hydraulics which must be resolved. Potential issues are that the fluid will get water in it which will effect its performance, potentially not working at all, or you are losing fluid from a leaking connector or, much worse, from the piston in the calipers and leaking onto the pads.

Get it to the dealer ASAP and don't accept an 'its not a problem' answer.
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post #10 of 28 (permalink) Old 16-05-19, 08:09 AM Thread Starter
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I found the brake pedal virtually wouldnít depress at all.

Been out in it since. No problem.

Probably dodgy sensor or low voltage somewhere.

Iíve emailed the AA report to the dealer.
Car goes into hospital all day Monday for a check-up so I get a courtesy car for the day

I have a feeling they wonít find much as itís probably an intermittent fault or one-off glitch.

Fingers crossed 😞😞

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