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Anti skid service required (under acceleration)

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Old Sep 20th, 2021, 19:19   #1
jpb1
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Default Anti skid service required (under acceleration)

Hi
2008 Volvo C30 1.6D with 108,000 miles.
Wondering if you'd be able to help diagnose my issue.

"Anti skid service required" light comes on, when I accelerate hard and pass roughly 3000rpm.
Light disappears after restart.

History:
Jan 2017 - bought car
2018 - anti skid light appears. Camshaft position sensor replaced. Fixed.
April 2021 - car seemed to cut out for a split second on motorway. Code came back as camshaft position sensor, so replaced again. No issue.

May 2021 - rear break calipers replaced.
July 2021 - anti skid light appears (around 1000 miles after caliper replacement. Remains permanently on (codes P0341 - Camshaft sensor, P0069 - Manifold Absolute Pressure, P1402). Turbo pressure sensor replaced.
July 2021 - light returns intermittently (often when accelerating hard, up to around 3000rpm). Recent codes:
P0341 - Camshaft sensor, P0238 - Turbo Boost Sensor, P2459 - DPF tegeneration frequency, P1402.

Following research, I've heard the Turbo Control Valve can fail, allowing pressure in the turbo to be too high.

Any ideas would be much appreciated.
Thanks, JP
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Old Sep 20th, 2021, 20:03   #2
Familyman 90
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ABS reluctor ring.

As a rough rule of thumb, if the fault/light ismoermanent its electrical.

If it's intermittent its ore likely to be but the system ismfine, but is 'reading' a mechanical issue.

It's easy to confirm/eliminate by dropping the wheels and taking a look.
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Old Sep 20th, 2021, 23:01   #3
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Thanks for your response. I will look into that.
JP
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Old Sep 21st, 2021, 09:55   #4
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Quote:
Originally Posted by Familyman 90 View Post
ABS reluctor ring.
Do these cars have ABS reluctor rings? The rear ABS sensors are built into the rear wheel bearings (as I've just replaced one last month), and there's no sign of a reluctor ring on the front driveshafts or wheel bearings either.

To the OP, what fault code reader are you using, if the anti-skid light comes on then there should be a fault code logged, but you may need VIDA to read it as some cheap code readers only show engine/transmission codes.
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Old Sep 21st, 2021, 11:04   #5
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Yes, they have reluctor rings on the driveshafts, P/N 00012106.

A fault will only be logged if its a fault on the electrical side of the ABS. Any transitory readings will reset when the ignition goes off if it's a mechanical issue, and may even reset whike driving if the fault doesn't reappear for long enough. That being the case you jeed to plug in and go for a drive and read the fault while the light is actually illuminated.

Just a thought. Check your front tyres aren't underinflated. If they're low it can cause enough rotational discrepancies to cause problems. I very much doubt it is that as you'd need to be pretty ham fisted not to feel it while driving, but it's a simple, zero-cost check.
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Last edited by Familyman 90; Sep 21st, 2021 at 11:07.
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Old Sep 21st, 2021, 18:49   #6
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Quote:
Originally Posted by pinballdave View Post
Do these cars have ABS reluctor rings? The rear ABS sensors are built into the rear wheel bearings (as I've just replaced one last month), and there's no sign of a reluctor ring on the front driveshafts or wheel bearings either.

To the OP, what fault code reader are you using, if the anti-skid light comes on then there should be a fault code logged, but you may need VIDA to read it as some cheap code readers only show engine/transmission codes.
Thanks. I'm using my own cheap fault code reader.
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Old Sep 21st, 2021, 18:53   #7
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Quote:
Originally Posted by Familyman 90 View Post
Yes, they have reluctor rings on the driveshafts, P/N 00012106.

A fault will only be logged if its a fault on the electrical side of the ABS. Any transitory readings will reset when the ignition goes off if it's a mechanical issue, and may even reset whike driving if the fault doesn't reappear for long enough. That being the case you jeed to plug in and go for a drive and read the fault while the light is actually illuminated.

Just a thought. Check your front tyres aren't underinflated. If they're low it can cause enough rotational discrepancies to cause problems. I very much doubt it is that as you'd need to be pretty ham fisted not to feel it while driving, but it's a simple, zero-cost check.
Funny you say that, as in the beginning, the light would often be on, but I seemed to regain normal driveability (as if it had reset whilst driving). However the light would remain until I restarted.

Strangely, the last few weeks, the reset only seems to happen with a restart.

Regarding the tyres, they are fine, but thanks for the tip!
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Old Sep 22nd, 2021, 07:49   #8
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Here is the link to the Turbo Control Valve issue that sounds simllar to mine.
https://youtu.be/w3ETt3qVxME

Another strange thing that probably isn't linked.
My horn has recently stopped working ocassionally. (Twice in the last month).
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Old Sep 29th, 2021, 07:51   #9
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Hi,
Updates:
Noticed my car often has a small dip in acceleration at low speed. I.e. this morning, third gear, a dip at around 1500rpm, when going from 1000 to 2000. It always seems to be under the same conditions (without the anti skid light being on).
Also, the horn has now completely stopped working.

Thinking of taking it to a volvo specialist, and asking to check:
Reluctor rings
Steering wheel positional sensor
Turbo control valve.

Thanks, JP
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Old Jun 8th, 2022, 12:35   #10
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Volvo C30 1.6D 2008, 114,000 miles, full service history.

October 2019
- Camshaft sensor replaced

April 2021
- Camshaft sensor replaced again

July 2021
- Boost pressure sensor replaced
- Map sensor replaced


February 2022
- Anti skid light started coming back on every drive. Not always under acceleration as before. Car drivable, as not going into limp mode.
- Boost valve cleaned out (apparently full of oil)
- DPF pressure pipes checked

(these repairs/checks did not resolve the issue)

March 2022
- Anti skid light still coming back on every drive. Not always under acceleration as before. Car drivable, as not going into limp mode.
- Engine management light comes on, and remains on.
- After a few journeys, car fails to start.
- EGR valve replaced.
(this repair did not resolve the issue, just removed the engine light)

May 2022
- Anti skid light still coming back on every drive. Not always under acceleration as before. Car drivable, as not going into limp mode.
- Engine management light comes on, and remains on.
- DPF pressure checked. Apparently good readings at idle and under revs, so not blocked.
- DPF additive refilled, as apparently the car wasn't regenerating
- DPF pressure sensor replaced
- I noticed carbon deposits around injectors. The garage checked, and said that 2 are leaking slightly at bottom seals, and 2 are leaking slightly at the top (however very minor first signs, so they've advised no need to repair currently). Note, some of the seals had previously caused misfires in August 2019, and this was repaired then).

(These repairs/checks did not resolve the issue, just removed the engine light. Note, the car is now regenerating at least)

June 2022
- Anti skid light still coming back on every drive. Not always under acceleration as before. Car drivable, as not going into limp mode.
- Engine management light back on, and remains on.

Conclusion/questions
- Latest codes on my cheap code reader: P0401 EGR flow insufficient detected, P0490 EGR control circuit A high, P0341 camshaft position sensor A circuit range/performance bank 1 or single sensor. My guess is that the camshaft sensor isn't faulty, as it has been replaced twice.
- The car stutters cruising or accelerating between 1500-2000rpm in any gear, but is fine under all other conditions. From reading a lot of internet forums, I understand this could be EGR issues (however, as my new EGR valve is less than 1 month old, could something else be causing it to fail or block up again)? Otherwise, do you think the leaking injectors could be the issue (however, I don't know why the Anti Skid Light would come on for this)?
- Garage said that in May 2022, there was one error they couldn't solve: "BCM-0101 Communication between control modules. Communication problems with engine control module (ECM)". Apparently they cleaned all the connections, but they noticed the ECM has been prized open at some point in time, which worried them.

Any thoughts and advise would be much appreciated, thanks!
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