Strange slippy road sensor/abs system issue

[umma08]

2008 Saab 9-3 1.8T Biopower.

Car has recently started showing strange behaviour.

Sometimes when turning (to the right mostly), the slippy road warning light flashes and the ABS seems to engage (at least it feels like the ABS). It feels like it's the front left wheel that it's happening on, when turning right/tyre under load.

What could this be?

I am tempted to get a new wheel hub and sensor to see if that fixes the issue, but forums seem to suggest a Tech2 might be better to diagnose the fault. I am in Ireland getting access Tech2 isn't easy.

There are no dashboard warnings, apart from when the 'slippy road sensor' engages. This lasts for max 1 second and then turns off. I have looked for codes on my elm327, but nothing. System Check at start says Systems Ok.

Car drives as normal otherwise.

Any ideas? Thanks in advance.

[Audax]

Have you checked all your tyres are good and undamaged and up to pressure? Other than that I think your idea is sound as it's probably a hub going bad but I would try and see if you can get it diagnosed before you end up buying 4 new hubs and still have the problem.

[sgould]

I’m not sure I can be of direct help. But if you are remote from a Tech 2, you may find benefit in fitting an eSID3.  It seems to read all the Saab codes which an Elm reader can’t access. I can read engine codes and I’ve seen codes for door mirror malfunctions, lock problems and other “Saab only” codes.

I’ve had mine for nearly two years and it’s paid for itself many times over.  Apart from just saving getting the Tech2 out, it has saved the hassle and cost of recovery more than once.  My wife is a professional singer and often travels on her own late at night from some distance away.  There have been occasions when a warning light has come on.  She has read the code, phoned me, and I’ve checked and found it to be non-urgent, and she has cleared the code and driven home.

eSID plugs into the diagnostic port and remains there.

https://esid.se/

[sgould]

I'm back with the computer that I keep my photos on.  Here's a typical item from the eSID3 code reading

[umma08]

I'm back with the computer that I keep my photos on.  Here's a typical item from the eSID3 code reading

Yeah, I looked at this, and seems a smart buy. I am undecided though. We have two Saab's, but my wife's is really on the last legs. 350km and counting.

Her car is in the garage next week, so will hopefully know more.

Mechanic thinks it might be the ignition coils (says he will check) which would make sense.

If I get a new/second hand set (part number 12787707), do I need a Tech2 to marry them?

[Audax]

They are a drop in replacement with no coding.

[aerojon]

coil/s for a TC/ABS issue,not in a trillion years..

1)What make tyres are they.2)How old are they(been on the car)..3) check the tyre tread depth..4)what year were the tyres made(look at the date code(4 digits)).

[umma08]

They are a drop in replacement with no coding.

Thanks.

[umma08]

coil/s for a TC/ABS issue,not in a trillion years..

1)What make tyres are they.2)How old are they(been on the car)..3) check the tyre tread depth..4)what year were the tyres made(look at the date code(4 digits)).

Yeah. I know.

Honestly, I think the car has two or three issues (it's a 2008 with 350k + on the clock)

I think the ABS issue is separate from the stuttering.

The more I drive it, the more I think they are separate anyway.

The ABS issue seems to only happen turning right. Which makes me think it's a hub issue on the left front. The stuttering happens consistently under power.

She is going in tomorrow for a check, so let's see what the mechanic says. Definitely trust him,as he is pretty old school. I am in the back of beyonds in Ireland....

[aerojon]

if the stuttering is when the car is boosting that is more than likely down to failing coil/s but it could also be a plug issue as no mention of which plugs are fitted currently(should be NGK PFR6T 0r D-10G)..when being put on what ever machine look at the misfire counts per cyl..OE COILS ONLY

[umma08]

if the stuttering is when the car is boosting that is more than likely down to failing coil/s but it could also be a plug issue as no mention of which plugs are fitted currently(should be NGK PFR6T 0r D-10G)..when being put on what ever machine look at the misfire counts per cyl..OE COILS ONLY

Yes. Mechanic diagnosed and issue with the plugs. Have been replaced and am collecting car tomorrow. They said they couldn't detect the ABS issue, and for me to keep an eye on it, and see if it resurfaces.

Also have a battery issue, which they think is battery related and not to do with circuit leak or alternator. I have read the voltage across the terminals at idle and it's 14.77v which seems high, but anyway! Am gonna take the battery back to the shop I bought from last year and claim warranty.

Thanks all for support. I thought she was close to her deathbed but seems there is life in her as yet!

[aerojon]

Make sure the plugs they've fitted are the ones i've listed..The plugs are an intergral part of the T8 ionization and knock sensing system..