Menu toggle

Hot!Hi anybody had any issues with the orange ABS warning light coming on after a brake fluid

Author
colinjhaffenden
PCGB Member
  • Total Posts : 7
  • Joined: 2013/06/22 09:45:37
  • Status: offline
colinjhaffenden PCGB Member
2020/03/26 13:51:15 (permalink)

Hi anybody had any issues with the orange ABS warning light coming on after a brake fluid

Hi anybody had any issues with the orange ABS warning light coming on after a brake fluid change
post edited by colinjhaffenden - 2020/03/26 14:00:37

12 Replies

colinjhaffenden
PCGB Member
  • Total Posts : 7
  • Joined: 2013/06/22 09:45:37
  • Status: offline
colinjhaffenden PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/03/26 13:57:58 (permalink)
Hi anybody had any issues with the orange ABS warning light coming on after a brake fluid change
MoC2S
PCGB Member
  • Total Posts : 4172
  • Joined: 2003/02/18 17:19:33
  • Status: offline
MoC2S PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/03/26 16:43:18 (permalink)
Hi Colin
 
Never seen that one - are we talking C4 or C2 ? When did the light appear - immediately after fluid change / bleeding, on brake application  ??? Professional change or DiY ?
 
Let us know, cheers, Maurice

Maurice Piper
993 Register Secretary 2003-2020
993 Assistant Register Secretary 2001-2003
' Wild things are always faster'
from ' Two Dogs' by Philip Hodgins
colinjhaffenden
PCGB Member
  • Total Posts : 7
  • Joined: 2013/06/22 09:45:37
  • Status: offline
colinjhaffenden PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/03/26 19:24:09 (permalink)
Maurice
It has started since a fluid change, (professional) I am told it is fault 40
Regards
Colin
p.S. C4
 
Mark Elder
PCGB Member
  • Total Posts : 2618
  • Joined: 2005/10/19 17:51:29
  • Status: offline
Mark Elder PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/03/26 20:40:31 (permalink)
Is it orange or red?  I thought (can't check, car not here) the only orange one was the brake pad wear indicator.
Anyway the ABS light that's not the green one (on C4):  I've had this come on immediately after a service because of fiddling about around the wheels that causes an ABS sensor to give up on life.  They don't last forever.  I've had 2 or 3 of them replaced in the last 14 years/70k miles.
 
I think there is a good chance that it was not the change of brake fluid that caused it but something else done at the same time.
Although I guess poor bleeding of the ABS pump might cause it (but would that not been one of the other brake warning lights?)

Mark Elder
993C4 Manual Coupe, Black/Black, 1996P, 70K of her 97K miles in my hands.
Best drives: CL627 in the Spanish Picos, A82 Loch Lomond to Glencoe
IAM Forth Valley membership secretary
Hacki
Guest of the Club
  • Total Posts : 9782
  • Joined: 2006/07/08 09:35:06
  • Status: offline
Hacki Guest of the Club
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/03/28 14:35:03 (permalink)
Have you had the engine running for a while? ABS light is the first to come on when you have low voltage. So, it might just disappear.

Owner of an inflatable Spitfire and an escape glider
-2- RSRTC
MoC2S
PCGB Member
  • Total Posts : 4172
  • Joined: 2003/02/18 17:19:33
  • Status: offline
MoC2S PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/03/29 12:37:36 (permalink)
Colin, can you clarify about the light? Take a photo ? Is it on permanently with ignition, or go out then return after a few seconds, or only when you drive over 5 mph for a while?
The C2/C4 question is critical, they are totally different braking systems ! Procedures for bleeding the C4 hydraulic boost system are far more complex ..
Fault 40 on the hydraulic ABS control unit is a return pump failure. In the circumstances a pump failure seems unlikely, but have they got 993 specific Diagnostic equipment capable of exercising the system?
 
I have to question the competence / knowledge of your professional ! Please give us all the facts ..
 
cheers, Maurice

Maurice Piper
993 Register Secretary 2003-2020
993 Assistant Register Secretary 2001-2003
' Wild things are always faster'
from ' Two Dogs' by Philip Hodgins
colinjhaffenden
PCGB Member
  • Total Posts : 7
  • Joined: 2013/06/22 09:45:37
  • Status: offline
colinjhaffenden PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/04/04 10:09:14 (permalink)
Just comes on intermittently, is stored with a trickle charger so shouldn't be that, thanks
Motorhead
PCGB Member
  • Total Posts : 4676
  • Joined: 2011/04/20 12:13:14
  • Status: offline
Motorhead PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/04/04 13:38:12 (permalink)
Colin,
 
Just to say that looking online, it seems that code 40 is emissions-related, i.e cat converter or lambda sensor, which seems very odd?
 
Maybe an ABS sensor or connection was knocked or damaged when the brakes were bled? Since the problem's intermittent, I'd be inclined to remake any connections if you can to ensure continuity.
 
Jeff

987.2 Cayman S
North Beds (R10 & R24)
MoC2S
PCGB Member
  • Total Posts : 4172
  • Joined: 2003/02/18 17:19:33
  • Status: offline
MoC2S PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/04/04 17:35:25 (permalink)
Jeff, I presume you're aware that the R0W normally aspirated 993 is not OBD2 compliant.
 
The ABS control unit has a set of codes, of which 40 is return pump failure as noted above. In the circumstances it may have been triggered by incorrect bleeding techniques, but we have little to go on.
Colin, here is a pdf of the ABS/ABD system componentry - from the diagram block 5 which lamp is illuminating ?

Maurice Piper
993 Register Secretary 2003-2020
993 Assistant Register Secretary 2001-2003
' Wild things are always faster'
from ' Two Dogs' by Philip Hodgins
colinjhaffenden
PCGB Member
  • Total Posts : 7
  • Joined: 2013/06/22 09:45:37
  • Status: offline
colinjhaffenden PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/05/13 21:39:47 (permalink)
Maurice I have driven the car to the MOT station and all was well on the way, however when they got in it to put it on the ramp the ABS lamp came on, then it got worse and the ABS orange light came on along with the ABD lamp, However the lights only come on when you actually start to move, both lights stay out until you start to move, so i think i will take the wheels off and just check each speed sensor to see if there is any corrosion present.
Regards and thanks, will let you know what i find.
Colin
 
colinjhaffenden
PCGB Member
  • Total Posts : 7
  • Joined: 2013/06/22 09:45:37
  • Status: offline
colinjhaffenden PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/05/15 12:14:57 (permalink)
Maurice
the red ABS light,(6) is slow to go out on start up but when out stays out. when rolling forward, (not backwards), the orange ABD light (7) and red ABS light (3) come on, problem started with just the (7) light 
The MOT tester checked the fluid level and said it looked a little dirty for new, and wondered if the service garage, (a well known Porsche dealer in the South West) had also changed / bled the booster fluid, (he used to work for Porsche it appears)
Regards
Colin
colt
PCGB Member
  • Total Posts : 248
  • Joined: 2006/02/27 20:22:37
  • Status: offline
colt PCGB Member
Re: Hi anybody had any issues with the orange ABS warning light coming on after a brake fl 2020/05/21 22:27:18 (permalink)
In my experience,  by far the most common reason for random abs system failure and warning lamp illumination is heavy corrosion of the front and rear alloy wheel carriers that the abs sensors are fitted into. The corrosion literally crushes the sensors in their housing , then they short circuit inside and the abs or abs/abd Ecu registers the wheel speed anomaly , often it doesn’t realise there is a problem until you move off as certain self checks and abs component tests are performed by the abs ecu at ignition on and engine start ,the last being speed sensor plausibility and output upon moving off from rest. A porsche Fault code reader will identify which ones are failing . You will not be able to remove the originals without destroying them, I usually have to knock the top off of them and then remove the rest by drilling the soft plastic housing . When thats removed , i clean and dress the aperture so that the new sensor is an easy fit in the hole and then apply anti seize paste to the new sensor exterior... the 5mm Allen key(M6)  sensor retaining  bolt that also locates the earth shield wire also can be difficult to remove and often shear, recourse to drill and tap as it’s under no stress , often welding a nut on the remains of the bolt will thermally shock it enough to remove cleanly, with patience and skill.
regards,Christian .....
Jump to:

Posts made and opinions expressed are those of the individual forum members

Use of the Forum is subject to the Terms and Conditions

Disclaimer

The opinions expressed on this site are not necessarily those of the Club, who shall have no liability in respect of them or the accuracy of the content. The Club assumes no responsibility for any effects arising from errors or omissions.

Porsche Club Great Britain gives no warranties, guarantees or assurances and makes no representations or recommendations regarding any goods or services advertised on this site. It is the responsibility of visitors to satisfy themselves that goods and/or services supplied by any advertiser are bona fide and in no instance can the Porsche Club Great Britain be held responsible.

When responding to advertisements please ensure that you satisfy yourself of any applicable call charges on numbers not prefixed by usual "landline" STD Codes. Information can be obtained from the operator or the white pages. Before giving out ANY information regarding cars, or any other items for sale, please satisfy yourself that any potential purchaser is bona fide.

Directors of the Board of Porsche Club GB, Club Office Staff, Register Secretaries and Regional Organisers are often requested by Club members to provide information on matters connected with their cars and other matters referred to in the Club Rules. Such information, advice and assistance provided by such persons is given in good faith and is based on the personal experience and knowledge of the individual concerned.

Neither Porsche Club GB, nor any of the aforementioned, shall be under any liability in respect of any such information, advice or assistance given to members. Members are advised to consult qualified specialists for information, advice and assistance on matters connected with their cars at all times.

© 2020 APG vNext Commercial Version 4.6