Traction Control and Tyre Pressure light

mark2912

I have an automatic 2010 VW Golf with a 7-speed transmission, and have a number of issues with it which I cannot tell for certain.... just wondering if any experts here could help?

Firstly, the car, despite being automatic, sometimes gets stuck in its 2nd gear (D2 and wrench icon flash on display), when this happens I have to switch off the engine then turn back on.

Also, the traction control and tyre pressure lights come on randomly while driving. They don't always come on but when they do, they stay on.

Could all these be linked to a faulty DSG/clutch?

Would appreciate if anyone on here could answer my question...

~Mark

CianRyan

The tyre pressure monitor in these is tied to the wheel speed sensors. A faulty wheel speed sensor may also cause gearing issues, I'd advise having this looked at by a mechanic ASAP as you may not have functioning ABS.

mark2912

CianRyan wrote: »

The tyre pressure monitor in these is tied to the wheel speed sensors. A faulty wheel speed sensor may also cause gearing issues, I'd advise having this looked at by a mechanic ASAP as you may not have functioning ABS.

Would a wheel sensor replacement fix this issue with the DSG?

I have been told by several garages I need a new clutch and they are quoting me mad prices between €750-1000 upwards :eek:

I also have the amber check engine light and was told that this was a faulty airflow sensor. But fob me off telling me they will get back to me with a qoute to replace this but never do... Could the issue with the wheel sensor cause this light also?

Toyotafanboi

I'd say two seperate issues.

Traction control and tyre pressure warning as said is most likely an ABS sensor.

Stuck in gear though is most likely a mechatronics issue and they are expensive. I can see how a clutch would be leaving you stuck in a specific gear, repeatedly.

dylbert

If it was a clutch issue would it not cause problems with all even gears and not just 2nd?

kirving

TC and Tyre Pressure is likely to be a wheel speed sensor. (Not saying it is, but even a steering angle sensor, or accelerometer could give similar symptoms, as all work together in TC and TP calculations.)

I know for a manual Audi Q5 I drove with a badly slipping clutch, the displayed gear selection display on screen would go blank while it was slipping.

ie: the car was only calculating what gear it thought it was in, by comparing engine speed with wheel speed. An auto will likely be different of course, but the car is trying to do an awful lot with just a couple of inputs. Any one of those being faulty can have wide ranging effects downstream.

But to be honest, you'd be exceptionally lucky if it was that. Multiple garages have suggested the clutch.

Has the Auto gearbox ever been serviced? What mileage is on the car? Are you going to a main dealer or independent?
Perhaps I'm wrong, but I would suggest that they're not getting back to you because they know you don't want to do the job.

mark2912

kirving wrote: »

TC and Tyre Pressure is likely to be a wheel speed sensor. (Not saying it is, but even a steering angle sensor, or accelerometer could give similar symptoms, as all work together in TC and TP calculations.)

I know for a manual Audi Q5 I drove with a badly slipping clutch, the displayed gear selection display on screen would go blank while it was slipping.

ie: the car was only calculating what gear it thought it was in, by comparing engine speed with wheel speed. An auto will likely be different of course, but the car is trying to do an awful lot with just a couple of inputs. Any one of those being faulty can have wide ranging effects downstream.

But to be honest, you'd be exceptionally lucky if it was that. Multiple garages have suggested the clutch.

Has the Auto gearbox ever been serviced? What mileage is on the car? Are you going to a main dealer or independent?
Perhaps I'm wrong, but I would suggest that they're not getting back to you because they know you don't want to do the job.

I'm not sure if the gearbox has ever been serviced, the mileage is 171600km. I bought the car off DoneDeal. I'm actually having it looked at by an independent garage on Monday.

I think one of the CV joints/axles may also be worn, as last week while cornering the car made a banging metal noise which seemed to be coming form the passengers side.

CoBo55

mark2912 wrote: »

I'm not sure if the gearbox has ever been serviced, the mileage is 171600km. I bought the car off DoneDeal. I'm actually having it looked at by an independent garage on Monday.

I think one of the CV joints/axles may also be worn, as last week while cornering the car made a banging metal noise which seemed to be coming form the passengers side.

The 7 speed box doesn't need servicing it's a dry box. The 6 speed used on the higher torque engines is a wet box and requires servicing. There was a recall on the 7 speed to change the control oil from synthetic to a mineral oil, I'd enquire whether this was done for starters.

mark2912

CoBo55 wrote: »

The 7 speed box doesn't need servicing it's a dry box. The 6 speed used on the higher torque engines is a wet box and requires servicing. There was a recall on the 7 speed to change the control oil from synthetic to a mineral oil, I'd enquire whether this was done for starters.

How can I check this? It didn't come with service history.

If it hasn't been changed and was part of the recall, is it too late now to get it changed as part of the recall? If not where can I get this done?

CoBo55

mark2912 wrote: »

How can I check this? It didn't come with service history.

If it hasn't been changed and was part of the recall, is it too late now to get it changed as part of the recall? If not where can I get this done?

I had a 09 7 speed DSG Octavia and it was recalled in 2015, it was done by the main dealer. It needs to be hooked up to the computer to be done properly.

mark2912

Update

I brought it to be looked at yesterday and they hooked it up to diagnostics.

"Clutch 1 Opens Unintentionally" is what the diagnostics returned in relation to the issue I've had with it getting stuck in 2nd gear.

With regards to the traction control and tyre pressure lights, I was told that this could be in relation to the mass airflow sensor needing replacement (which is what is causing the check engine light), is that possible?

They said that it wasn't a faulty wheel sensor causing those two lights, as if that was the case the ABS light would also be on, which it's not.

Toyotafanboi

Needs a mechatronics IMO but would need a few further checks to be 100%.

Seen some crazy things with VW's and faults but never seen a fault air flow sensor bring on a tyre pressure light.

I'd be inclined to not be too keen on this workshop.

mark2912

Toyotafanboi wrote: »

Needs a mechatronics IMO but would need a few further checks to be 100%.

Seen some crazy things with VW's and faults but never seen a fault air flow sensor bring on a tyre pressure light.

I'd be inclined to not be too keen on this workshop.

From shopping around different garages/workshops (for different quotes/opinions), they've all said it needs a new clutch kit. I thought it may have had something to do with the mechatronics after googling the issue I've been having and have asked if it could be this but all have said that the mechatronics is fine.

Was also told today that replacement parts for DSG (clutch etc) are actually a lot stronger than the original parts installed during manufacturing :eek:

CianRyan

I've actually seen issues similar to that with Nissans.
Odd ball stuff.

mk7r

Toyotafanboi wrote: »

Needs a mechatronics IMO but would need a few further checks to be 100%.

Seen some crazy things with VW's and faults but never seen a fault air flow sensor bring on a tyre pressure light.

I'd be inclined to not be too keen on this workshop.

Unplug a mk4 MAF and you will get a traction control light etc, they share a ground wire I believe so anything is possible

mark2912

mk7r wrote: »

Unplug a mk4 MAF and you will get a traction control light etc, they share a ground wire I believe so anything is possible

Yeah, they did say that all were linked to one another. Mine is a MK6 though..

grogi

CoBo55 wrote: »

The 7 speed box doesn't need servicing it's a dry box. The 6 speed used on the higher torque engines is a wet box and requires servicing. There was a recall on the 7 speed to change the control oil from synthetic to a mineral oil, I'd enquire whether this was done for starters.

Not true. Dry/not dry applies only to clutches. The gearbox and control unit still use oil that ages and deteriorates with age and usage.

CoBo55

grogi wrote: »

Not true. Dry/not dry applies only to clutches. The gearbox and control unit still use oil that ages and deteriorates with age and usage.

It's the constant engaging and disengaging of the clutches in the wet type box that causes the oil to degrade over time and the requirement to get it changed on time is very important. Control oil doesn't degrade as it never contacts the clutches, yes you can get it changed but there's nothing to be gained by doing so. It's very tricky to do properly and a lot of damage can result by it being done incorrectly. I certainly wouldn't be getting any old Joe to do it.

mark2912

Update

I got my car back today after leaving it in to have the DSG issues fixed. It needed a new clutch kit as well as repairing the mechatronics.

The engine light issue has also been resloved, turns out the hosing around the MAF was loose.

However, the traction control and tyre pressure light still come on, and this seems to only happen when revving the engine up. Does anyone know what is causing this? It can't be a wheel sensor as the ABS light would also come on.......