brake pressure senders fault

[skahigh]

Do you have a problem with your pressure sensors?

Yes, getting an intermittent code from one of them G214, fault in circuit. It's only happened since I added a little box of tricks to fix my slow fan speed problem.

I don't think its possible that its that box causing the problem because it's only wired to the fan control module and then earthed to the car body.

The first time we put everything back together though we forgot to tighten the main earth lead completely and thats when I started getting lots of codes. Since then it's all been tightened up and I'm left with just the one fault.

 

[Willie]

Yes, getting an intermittent code from one of them G214, fault in circuit. It's only happened since I added a little box of tricks to fix my slow fan speed problem.

I don't think its possible that its that box causing the problem because it's only wired to the fan control module and then earthed to the car body.

The first time we put everything back together though we forgot to tighten the main earth lead completely and thats when I started getting lots of codes. Since then it's all been tightened up and I'm left with just the one fault.

Yup I'm getting the same, this for me has just been since brake fluid was changed. I have the nime box fitted for ages before this so don't think there were any links with this.
What else have you tried?
I've had mine MOT'd and nothing showed up during this to point toward any loss of brake performance.

 

[skahigh]

Yup I'm getting the same, this for me has just been since brake fluid was changed. I have the nime box fitted for ages before this so don't think there were any links with this.
What else have you tried?
I've had mine MOT'd and nothing showed up during this to point toward any loss of brake performance.

Yes my brakes seem fine. On the weekend I am going to trace the wires from the sensors on the master brake cylinder and see where they earth. I earthed the nime box to one of the two screws under the battery, the smaller one nearer the wing (not the main battery earth).

I have a feeling that the brake pressure senders may earth to this, if not then I guess I will try replacing the sensor. A bit odd though as it only started after I fitted the nime box. It could be that the fault was a caused by driving with the main earth not done up correctly rather than the nime box itself.

It's a nightmare to find any info on the G214 sensor anywhere on the net.

 

[Willie]

I've got a problem with both of my sensors at the same time, I'll have to check the earths when get home.
Have you traced these to the place under the battery or are you presuming that its there?

 

[skahigh]

I've got a problem with both of my sensors at the same time, I'll have to check the earths when get home.
Have you traced these to the place under the battery or are you presuming that its there?

Presuming at the moment, the tracing will be done on saturday probably.

The thing is, when I ran the car with the main battery earth not properly screwed down I got a tonne of codes all relating to the ABS and intermittent circuit problems with other controllers (instruments, CAN gateway, etc.).

 

[Willie]

Cool, could you let us know how you get on please

 

[skahigh]

of course

 

[Muttley]

Brake pressure sensors are both wired directly to the ABS controller, no earth connection. The master cylinder itself has a solid connection to the bodyshell, so there is no need for extra earth connections.

The ABS controller is earthed to the same point you have used for your add-on box. It's possible you have affected the ABS controller, which will mean a new unit. If you're lucky, you might get away with just changing the sensor.

 

[skahigh]

Brake pressure sensors are both wired directly to the ABS controller, no earth connection. The master cylinder itself has a solid connection to the bodyshell, so there is no need for extra earth connections.

The ABS controller is earthed to the same point you have used for your add-on box. It's possible you have affected the ABS controller, which will mean a new unit. If you're lucky, you might get away with just changing the sensor.

I doubt it's a faulty unit due to the nature of the problem, its an intermittent error in circuit. Besides, why would the unit fail now? Seems far too coincidental.

 

[Willie]

Mines is intermitant aswell, only seems to happen when I'm driving the car not when wife driving.
I'll check my earth point as a starting point.

 

[skahigh]

Junior, mine only seems to happen when I really use the revs, normally I drive quite sedately and didnt get any light driving over to my dads. Gave it some beans on the way back and the light came on. Perhaps it's a similar thing with you and the little lady?

 

[Willie]

Aye very similar.
I'm also thinking that it might be when cornering hard aswell so hoping its this earth point as its well cheaper than new sensors

 

[Ruddmeister]

Aye very similar.
I'm also thinking that it might be when cornering hard aswell so hoping its this earth point as its well cheaper than new sensors

Another thing to check....

My ABS would trigger at low speeds whilst turning e.g. pulling into a parking bay.

Basically the ABS wire was being stretched when I was turning the wheel and the cable had a small break just behind the sensor (front NS sensor). Only when I used a lot of lock and the wire got stretched did the broken wire send false signals and the ABS cut in.

A mechanic rewired the plug which cost me 30 mins of his time

Maybe of some use

 

[skahigh]

Cheers Rudd, thats the kind of comment I like to read.

 

[skahigh]

Checked my earths again today and everything looks fine. Discovered that my G201 sensor is now throwing a similar error to the G214 as well. It's starting to look like a fault ABS control module. Anyone any idea what thats likely to cost to fix?

 

[Willie]

Not sur about this but cars are becoming more remove broken part and fit with new part orientated. Would doubt this is fixable but might be

 

[skahigh]

Not sur about this but cars are becoming more remove broken part and fit with new part orientated. Would doubt this is fixable but might be

Not sure what you mean Junior......fiddling about with the sensors on the brake master cylinder appears to be a b**tard of a job, almost impossible to get at and would require full system bleed, etc.

Had a good look around today and decided it's gonna have to go into the garage to do.

 

[Willie]

i'm saying I doubt that the sensors would be fixable, most of the parts are throw away and get new ones.

 

[skahigh]

i'm saying I doubt that the sensors would be fixable, most of the parts are throw away and get new ones.

I see, quite right although you can clean them as that is often a reason why the sensors would throw errors.

Touch wood I have had no TCS light on my last four journeys, I'm sure its only a matter of time.

 

[Willie]

I've been away for 2 weeks and the light didn't come on once with the wife???
very confusing.
I'm going to be getting into the guts of the car soon anyway so will have a look then