Think I’ve broken my zed

andystone · Post by **andystone** » Sat Apr 14, 2018 6:36 pm

Evening all! Replaced my rtab’s Today, went for the test drive (as it’s the law!) and very quickly discovered I now have no brakes! Quick scan shows pressure sensor error. Can anyone shed some light on this? How do I fix it, from what I’ve read it’s located on the brake line?!?!

ph001 · Post by **ph001** » Sat Apr 14, 2018 6:38 pm

No pressure sensor problem is going to result in no brakes!!! Are you sure you haven’t fractured a brake line whilst doing the rtab? Any fluid leaks anywhere?

ph001 · Post by **ph001** » Sat Apr 14, 2018 6:39 pm

The sensors by the way are on the abs/dsc unit.

andystone · Post by **andystone** » Sat Apr 14, 2018 6:48 pm

ph001 wrote: ↑Sat Apr 14, 2018 6:38 pm No pressure sensor problem is going to result in no brakes!!! Are you sure you haven’t fractured a brake line whilst doing the rtab? Any fluid leaks anywhere?

I need to have another look to be fair. Was thinking about braided hoses all round.

andystone · Post by **andystone** » Sat Apr 14, 2018 6:51 pm

ph001 wrote: ↑Sat Apr 14, 2018 6:39 pm The sensors by the way are on the abs/dsc unit.

Sorry bud, where? Ediot guide?

andystone · Post by **andystone** » Sat Apr 14, 2018 9:09 pm

Can anyone near to Yeovil help? Anyone with a posh scanner?

andystone · Post by **andystone** » Mon Apr 16, 2018 8:00 pm

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Definitely have a brake fluid leak, reservoir about half empty and wetness notes on the inside of my rear wheel. New stainless lines ordered!

ph001 · Post by **ph001** » Mon Apr 16, 2018 8:44 pm

Had to be a leak somewhere. Hope you get it sorted.

Anmarube · Post by **Anmarube** » Mon Apr 16, 2018 9:10 pm

ph001 wrote: ↑Mon Apr 16, 2018 8:44 pm Had to be a leak somewhere. Hope you get it sorted.

Agree. Got to be a leak. Get under the car and you should see fluid if you've depressed the pedal. Quite a lot would have came out and ran along the car. Depending on the speed you were doing when you found the pedal to the floor.
Glad your still alive by the way. Always a bonus with brake failure.

GuidoK · Post by **GuidoK** » Mon Apr 16, 2018 11:02 pm

ph001 wrote: ↑Sat Apr 14, 2018 6:39 pm The sensors by the way are on the abs/dsc unit.

The pressure sensors are on the master brake cylinder, not the abs/dsc unit:

#2 (there are 2 of them).
If you have no brakes and a pressure sensor warning, my guess you either have a leak, or a lot of air.

But I have a suspicion that we dont hear the complete story. Where's that steering angle error coming from, and you have a brake level sensor error.

andystone · Post by **andystone** » Tue Apr 17, 2018 6:36 am

Thanks all. The steering angle fault has been present since I bought the car two years ago and brake level fault since half the fluid has leaked following my rtab replacement

ph001 · Post by **ph001** » Tue Apr 17, 2018 7:34 am

GuidoK wrote: ↑Mon Apr 16, 2018 11:02 pm The pressure sensors are on the master brake cylinder, not the abs/dsc unit:

It’s the same lump though really!

Ducklakeview · Post by **Ducklakeview** » Tue Apr 17, 2018 8:29 am

ph001 wrote: ↑Tue Apr 17, 2018 7:34 am
GuidoK wrote: ↑Mon Apr 16, 2018 11:02 pm The pressure sensors are on the master brake cylinder, not the abs/dsc unit:
It’s the same lump though really!

Actually it depends on the car. Pre facelift cars have them screwed into the master cylinder:

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Whereas post don't..

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Mike

ph001 · Post by **ph001** » Tue Apr 17, 2018 11:31 am

Ah, apologies - was thinking of my E46 M3. Does the N52 not have them at all then?

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