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4 warning lights popped up

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Dr. Zed

Active member
Swindon
Evening all,

Was driving along the motor way and the tyre pressure, ABS and the exclamation mark warning all popped on, also accompanied by the Amber warning symbol that sits in the rev counter (the A with the arrow going around it, which I believe is the traction control). Anyways, I've found similar threads here with people saying it can range from steering wheel angle sensor, ABS sensor or DTC sensor, but all of those threads had 3 warning lights, I have 4.
I haven't ran a scan yet and won't be able to till next weekend.
Any early suggestions?
 
First thing for me would be to check the tyre pressures are OK, and if so then reset that light and see it if stays off.

Mainly as it's the only one I could do.

Paul
 
When you get all four it is usually an abs sensor. Need a code reader to say which one. If the Speedo still works it’s not rear left.
The other possibilities tend not to put the tyre warning light on
 
enuff_zed said:
When you get all four it is usually an abs sensor. Need a code reader to say which one. If the Speedo still works it’s not rear left.
The other possibilities tend not to put the tyre warning light on
Click to expand...

Cheers mate,

I'll get it read when I get home this weekend. Away from the house for a week unfortunately.
If it's an ABS sensor then that's not too bad. Reckon it'll be a case I can clean them, or needs replacing. Or hard to say without reading codes and checking the sensor?
 
DevonPaul said:
First thing for me would be to check the tyre pressures are OK, and if so then reset that light and see it if stays off.

Mainly as it's the only one I could do.

Paul
Click to expand...

Thanks Paul,
I can't imagine it'll be the tyre pressure as I checked them before starting my journey and I doubt it'd cause my other lights to come on.
 
Dr. Zed said:
enuff_zed said:
When you get all four it is usually an abs sensor. Need a code reader to say which one. If the Speedo still works it’s not rear left.
The other possibilities tend not to put the tyre warning light on
Click to expand...

Cheers mate,

I'll get it read when I get home this weekend. Away from the house for a week unfortunately.
If it's an ABS sensor then that's not too bad. Reckon it'll be a case I can clean them, or needs replacing. Or hard to say without reading codes and checking the sensor?
Click to expand...
To be clear, it's not a 100% definite, but I've always found it to be one with the tyre light on too. Others may have different opinions.
They are sealed units and either work or don't, so swap for a new one.
If it's rear right then there is also a possibility it is the reluctor ring (the cage with the holes in that provides the signal pulse) as these are separately fitted and do corrode.
On the front the sensor reads more robust ridges on the inner face of the hub. On these front ones the biggest issue you will encounter is not shearing the mounting bolt. Plenty of penetrating oil, maybe a bit of heat applied, and go very careful.
 
Dr. Zed said:
DevonPaul said:
First thing for me would be to check the tyre pressures are OK, and if so then reset that light and see it if stays off.

Mainly as it's the only one I could do.

Paul
Click to expand...

Thanks Paul,
I can't imagine it'll be the tyre pressure as I checked them before starting my journey and I doubt it'd cause my other lights to come on.
Click to expand...
Out of interest, did you hit any standing water or mud? This could give issues with the sensors as well. In which case it never hurts to clean around the hubs in case any debris has become wedged in there.
 
Wheel speed sensors are cheap as chips so I wouldnt bother with cleaning them, just get a new one although you would do well to get a small paintbrush in the hole and give the reluctor ring a clean.
 
[ref]enuff_zed[/ref],
Thanks for the info mate

It hadn't driven for about 2 days on the day it popped up and didn't have any issues beforehand.

I know you're saying it's not 100% but it's a good direction for me to look in. I'll get it scanned to confirm but at least it doesn't seem like it's going to cost a fortune which is always good!
 
So, here's an update after running the code reader on it.
Seems to be the speed sensor, and not the ABS sensor. Would I be right in assuming that?

Although the lights have since gone out..?
 

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Funny enough, mine did exactly the same this morning. Plugged in my reader and it was the front nearside sensor too. Cleared the code an all seems well 🤞🤞
 
healeyneil said:
Funny enough, mine did exactly the same this morning. Plugged in my reader and it was the front nearside sensor too. Cleared the code an all seems well 🤞🤞
Click to expand...

I've cleared the codes too and haven't come back since but still don't like the idea of it as it seems quite serious so I'm a little concerned still..
 
Dr. Zed said:
healeyneil said:
Funny enough, mine did exactly the same this morning. Plugged in my reader and it was the front nearside sensor too. Cleared the code an all seems well 🤞🤞
Click to expand...
I've cleared the codes too and haven't come back since but still don't like the idea of it as it seems quite serious so I'm a little concerned still..
Click to expand...
Looking at what you have, there seem to be codes for various wheel sensors. However, we don't know how long they've all been there.
I would suggest that until the fault happens again you won't be able to exactly determine which one it is.
Keep your code reader in the car and when it happens again immediately check the codes and hopefully that will give clearer indication.
Usually these kind of things fail a bit like a light bulb, as in, when you switch them on and off. That is why I asked whether you'd been through deep water or muddy roads as it seemed odd for it to happen mid-journey.
Keep watching it.
If it does occur again it means you won't have the DSC active, so just drive a little more cautiously round sharp bends, off roundabouts etc.
In effect, your Z4 becomes a Capri until you reset it :wink:
 
Yes, very old fashion driving with the lights on :lol:

I have bought the sensors but ordered a car lift so am waiting for that to arrive before replacing the sensors
 
pvr said:
Yes, very old fashion driving with the lights on :lol:

I have bought the sensors but ordered a car lift so am waiting for that to arrive before replacing the sensors
Click to expand...

Dream of mine is to have a car lift! Very jealous
 
At least it is the cheap one. The rear one which I have to change as well is more than twice the cost
 
Which sensor was it?
Be sure to soak the mounting bolt in penetrating oil beforehand and use the exact size Allen key. 5mm or 6mm, can’t remember which.
Take it easy as you don’t want that bolt shearing off.
Last one I did we had to resort to Mole grips and removed the calliper to get enough purchase on the bolt.
 
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