23 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHReplacement ABS Module Options
Reported or suspected cause
electrical and not mechanical
Reported cause
No successful repair reported for this finding.
1
Identified cause
0
Suspected cause
0
Reported fixes
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that report identifying a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Reported cause
in my case the ABS light came on even without driving the car, which lead me to understand the issue was electrical and not mechanical.
Leading evidence: 'electrical and not mechanical' (1 discussions report identifying this cause; no attributable repair resolution). Across 1 matching discussions, the most frequently mentioned possible cause is 'electrical and not mechanical' (1 discussions; 1 report identifying it and 0 suggest it). The most frequently discussed action is 'Repair return pump fault' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that suspect a cause
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suspected cause
The first numbers are probably a date code or serial number.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I need to replace my abs pump / module to repair my return pump fault.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
I need to replace my abs pump / module to repair my return pump fault.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
although I don�t have any experience with the PSM i still think replacing the module worth a try.
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
23 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
it solved my problem and the replacement module did not required any programming.
I need to replace my abs pump / module to repair my return pump fault. Can I purchase a module out of any 996 or does the part number have to match exactly? I see many on eBay ranging from various prices, from as low as 25 to 1800, with part numbers varying by a digit or 2 at the very end. Picture of my pump for reference. I have a 2000 c2. Part number on the pump is 996.355.755.46
Also, is there any coding required when changing the pump / module?
Coupes and 2wd Targas should be one part, then you have C4/GT/Turbo with and without PSM,
Just to not make your life suck I'd find one from the same year and model. With same antilock system.
I matched the PN exactly. Yes, I saw a bunch of variants and no, I was not willing to chance it with all of them being a bunch of money and the install being a pain in the ***.
Who diagnosed this? You said with the PSM pump disconnected you still had ABS correct?
If you are getting the 4460 code I'd try a proportioning valve on the secondary circuit. This code sometimes happen with a GT3 MC on a C2.
Zbomb, did you have to code yours when you replaced it?
I diagnosed it. The wiring is all fine. Master is oem. The abs light used to come on under hard braking at the track. Now it is on all the time. I clear the code, go for a drive, when I turn the car off and back on abs light comes on for return pump failure. Same situation when the actual return pump is unplugged.
Code is 4266.
I had an intermediate abs light coming on for a long time, that turned into permanent.
Duramatric was reading different codes every time, and sometimes not communicating with the module at all.
I got a used part of eBay with the same part number just in case.
I didn�t want to mess with the hydraulic lines, so I thought I will start with replace only the module.
it�s a bit difficult to get to one of the screws, but not as involving as replacing the whole unit and bleeding the system.
it solved my problem and the replacement module did not required any programming.
my car is 02 C2 no PSM.
I do have PSM, although, I not not against deleting it if it involves saving 1000+ dollars. I see boxster units as cheap as $25 on eBay lol. For that price I almost want to try it, but it's a headache to install / bleed the brakes after.
so do what I did and replace only the module. Worst case you lost $25 and one hour of your life 😁.
the aluminum block is a set of mechanical valves. I find it hard to see how they can go bad (although possible).
in my case the ABS light came on even without driving the car, which lead me to understand the issue was electrical and not mechanical.
although I don�t have any experience with the PSM i still think replacing the module worth a try.
Yea I think it might be worth a shot I am just not sure if that will have the same coding / function as mine. But again for $25-$60 it�s worth trying.
when I originally bled my brakes the fluid was green, maybe it was the abs module falling apart internally? Who knows.
just make sure you buy the same part number, and you should be good.
look at the BOSCH part number on the module itself. not the one on the aluminum block.
Have search over internet realized only 6 screws to unscrew in order to remove the module. Beforehand I know couple of them are hard to access, but actually they are even not visible and accessible, can anyone advise do I have to remove the whole pump to unscrew the last 2? Have seen some posts they didn't have to or maybe the lhd 996 easier? Thanks
So you just unplugged the connector to the black plastic module, unscrewed the module, screwed in another used one, plugged it in and done? No more light? Im gettting the ABS and PSM light on my 2000 C4 and my indy said its the ABS pump, but maybe just the module?
It it's the ABS return pump code (4460? Can't remember) this happens because a wire inside the module burns out. So a new module with the same Bosch number will fix that. A company called Module Master can fix your module if you want to go that way.
