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For a while now I have had a park brake fault message on the dash but it does seem to actually work fine. It applies & releases as it should. After a full reset disconnecting the battery it tries to recalibrate but still comes up with the fault message every time.

I have attempted to get my local garage to resolve this issue. The conclusion they have come to is that there is a problem with the module. They also mentioned something about a hall effect sensor?

They seem to think that you can't just replace the module with another unless it has exactly the same part number on it. They also suggest it might need programming if replaced.

Is this the case because there are often park brake modules coming up for sale on ebay & I wondered if anyone else has swapped one out for another with any success?
 

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The problem is, it could be the Hall effect sensor in the actuator. New ones are £200ish. Or it might be the module.
You can straight swap the modules, no programming. But, as you said, you need the correct part and there are loads of different engineering numbers. Some will correspond to the same part number.
Are your pads and discs within minimum thickness spec?
 

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My Dad's 3.0 has also been getting the Parkbrake Fault message intermittently for the past couple of years despite working fine.....I seem to recall that the driveaway auto release feature stops working when the message is displayed?

Apparently one possible cause is the wiring harness rubbing on the halfshaft and wearing through the insulation, although his one is okay on that front

From the workshop manual it seems that the diagnostic tool is specifically for the EPB module alone so really needs a trip to the main stealer or a suitably equipped specialist..........
 

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I've had a few parking brake errors over the years and initially thought it was the el cheapo battery. That made a difference but then I found a dodgy earth behind the headlights and once that was fixed not had it since. He says grabbing all the wood he can find!
 

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Ive had this fault permanently showing for at least 5 years , everything works fine so I just ignore it.
How does your car pass its Mot with this fault showing?
I had a similar problem last year and Chris The Jag specialist at Doncaster fixed it by the replacing the park brake unit
 
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