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Old 15th June 2017, 01:24 PM   #1
bigrichw
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Default Changing DSC pressure sensor 2

So, DIS tells me number 2 sensor is bad, so needs replacing.
Ive ordered one, but which is number 2 - the one nearest the bulk head?

Also, are the fairly easy to change? Any one done it, any tips?

Ta
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Old 15th June 2017, 01:25 PM   #2
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Change both at the same time.. I had a local garage do mine I supplied the sensors they charged 80!! They said it was a awful job!!
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Old 15th June 2017, 01:33 PM   #3
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There is no set position for 1 and 2 as crazy as that sounds.
I've checked on 5 cars and they were different.
Best to un plug one then scan for codes to get the correct one
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Old 15th June 2017, 01:34 PM   #4
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I can imagine, the location of them is bloody awful to get to them. May be the best idea - get someone else to do it lol
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Old 15th June 2017, 01:34 PM   #5
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Not a bad job if you have small hands and flare spanners
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Old 15th June 2017, 01:41 PM   #6
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Will fluid spill out when they are removed?
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Old 15th June 2017, 01:45 PM   #7
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and what size spanner do you need?
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Old 15th June 2017, 01:59 PM   #8
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Number 2 is the most forward one.

I don't understand the whole change 2 at the same time. It's not like there is an economy of scale in labour as nothing has to be removed to get to them and the other might never fail. It would be like changing all 4 ABS sensors because one has failed.

Also don't understand why people say it's a nightmare. It took me 20 minutes all in. Fill the cavity with paper towels and thoroughly clean the area afterwards. If you are quick, and stick a finger over the hole between swapping you won't even need to bleed your brakes.
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Old 15th June 2017, 02:00 PM   #9
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Quote:
Originally Posted by j3nks79 View Post
There is no set position for 1 and 2 as crazy as that sounds.
I've checked on 5 cars and they were different.
Best to un plug one then scan for codes to get the correct one
Oh really? I checked the live data and found 1 was the rear one. Assumed that would have been standardised
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Old 15th June 2017, 02:07 PM   #10
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Quote:
Originally Posted by rossjsy View Post
Oh really? I checked the live data and found 1 was the rear one. Assumed that would have been standardised
Been there mate.

I checked 5 other cars after and they were all different
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Old 15th June 2017, 03:39 PM   #11
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DIS is saying front axle pressure is low - but I cant even get the connector block off the sensor, is there a retaining clip or something?
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Old 15th June 2017, 04:19 PM   #12
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Quote:
Originally Posted by bigrichw View Post
DIS is saying front axle pressure is low - but I cant even get the connector block off the sensor, is there a retaining clip or something?
Nope. Just fiddly. Just like any other sensor.
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Old 15th June 2017, 04:20 PM   #13
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Quote:
Originally Posted by rossjsy View Post
Number 2 is the most forward one.

I don't understand the whole change 2 at the same time. It's not like there is an economy of scale in labour as nothing has to be removed to get to them and the other might never fail. It would be like changing all 4 ABS sensors because one has failed.

Also don't understand why people say it's a nightmare. It took me 20 minutes all in. Fill the cavity with paper towels and thoroughly clean the area afterwards. If you are quick, and stick a finger over the hole between swapping you won't even need to bleed your brakes.
You should always bleed the brakes. No matter how fast you are your still not faster than air.
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Old 15th June 2017, 05:12 PM   #14
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https://autotecdirect.com/2012/04/25...r-replacement/

Step guide...
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Old 15th June 2017, 05:32 PM   #15
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"Tighten the sensor and replace the brake pipe flare nut, refit the vacuum pipe to the servo unit, top up the brake fluid and if the system needs to be bled, usually all is required is to slacken the union from the master cylinder to the ABS housing and a pump or two is usually enough"

What's the union guys?
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Old 15th June 2017, 05:41 PM   #16
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...........

Last edited by schooner32; 15th June 2017 at 05:41 PM. Reason: Double
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Old 15th June 2017, 06:11 PM   #17
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Quote:
Originally Posted by bigrichw View Post
DIS is saying front axle pressure is low - but I cant even get the connector block off the sensor, is there a retaining clip or something?
So this means the rear is out. As this is high when no pressure applied
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Old 15th June 2017, 06:53 PM   #18
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Quote:
Originally Posted by schooner32 View Post
You should always bleed the brakes. No matter how fast you are your still not faster than air.
Quote:
Originally Posted by schooner32 View Post
"Tighten the sensor and replace the brake pipe flare nut, refit the vacuum pipe to the servo unit, top up the brake fluid and if the system needs to be bled, usually all is required is to slacken the union from the master cylinder to the ABS housing and a pump or two is usually enough"


You sure?
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Old 15th June 2017, 06:56 PM   #19
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Quote:
Originally Posted by rossjsy View Post


You sure?
Yep it's always recommended. I was asking a question about that quote. Not using it as a source of info
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Old 19th June 2017, 06:45 PM   #20
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Just went to see if I could change the sensor. Unluckily it's the rear one. Was proving awkward. Managed to unplug it but couldnt get it off. I ended up giving it a couple of taps, (if in doubt) and read the pressures again. Previously -1.6 on the good one and 13/16 on the dodgy one. After a tap it dropped, to 3/4 bar. So gave it another tap. It's now reading -1.6 bar as it should. I don't have a clue how these things work, but a couple a light taps and all appears well. Let's see how long it lasts.
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