So, it's gonna be a long story. The car is a 2014 Jaguar XJL (X351) with 2.0 GTDi turbo petrol engine. Had park brake fault message on the dash a month back stating "Cannot Apply Park Brake". Upon inspection I noticed that the rear disc pads were worn real thin so i've decided to get the pads and wear sensor replaced. Did the brake calibration after that where i removed the negative battery terminal for about 1 minute, reconnect and gave the brake pedal a few solid presses and pull up the park brake switch but to no avail and the "cannot apply park brake" message still showing on the dash.

At that point i've decided to pull codes using OBD tool and got "C1127-31, position sensor". After thorough inspection (wiring and park brake control module etc) and reading through lots of different jaguar park brake actuator thread online the only conclusion that i can make is maybe the park brake actuator on my car has went bad (as i understand it's located under the rear sub frame and overtime water might get inside and damage the actuator). So i went and bought a brand new original jaguar park brake actuator (with the correct part number and what not) from my local dealer and got it installed. Did the park brake calibration afterwards and voila! The error message is gone and everything is now working as it should be.

However, as I thought that it's finally fixed (as the procedure of swapping the park brake actuator is a pain in the ***), the error message pop right back out after driving the car for about 60km. This time round the error code is "U-2011-13, Motor". Double checked the wiring, all connections and even the park brake module but still cant seem to find anything wrong with it. The fault message will go away if i do the brake calibration procedure and reoccur after driving it for a short distance and i get no park brake once the error message is shown on the dash. At this point im really out of idea of what should i do next as i've already spent a lot on changing the actuator, disc pads and wear sensor. Could anybody give me a pointer as in what should i be looking for next? Any suggestions are welcome. It's also worth noting that the CCA of the battery is at 746 CCA. Thanks.

 

Very good job repairing and troubleshooting this!
Only thing I can suggest is the old standby of how old is the battery?
They can and do cause a lot of strange things to happen!

The PB motor is part of the actuator? yes? So it's also new? Maybe it went bad and you can get it replaced it under warranty? I know it's a tough repair because of where it's mounted.
Did you lower the rear sub-frame to replace it? I know if you had Jaguar do the repair they are suppose to give you a 1 year warranty. Parts and labor.

Otherwise it's pointing to the parking brake motor itself. Do you use the Parking brake regularly? I ask because for some reason Jaguar stopped having it applied when you shift into park automatically and the only way you can use it is manually. This seems strange as almost all other Jaguars and even other brands of cars automatically apply the PB when the car is shifted into park. I rarely use mine because of this although I probably should.

I don't see where you live but is it a salt area?
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The parking brake should be applied consistently, especially if the vehicle is parked on a sloped surface, to avoid putting excessive strain on the gearbox parking pawl.

 

The car actually belongs to a friend of mine. He bought it used 2 years back and havent been going back to jaguar for the maintenance so the warranty has been voided. Also, by the looks of it i dont think the battery has been replaced before as it's still the original jaguar battery inside the rear trunk (which mean the battery should be at least 6 years old). I live in Malaysia where it's tropical weather all year round and it's quite humid. Just how to tell when the battery need to be replaced? As mentioned in my earlier post, the current battery is at 746 CCA.

 

With the ignition in the OFF position, check the voltage across the battery terminals with a voltmeter. There should be a minimum of 12.6 volts. If not, charge the battery for five hours at 2 to 5 amps and retest the voltage. If there is still less than 12.6 volts, replace the battery.

Battery age is an indicator, but if the battery has suffered from being discharged and recharged repeatedly, it's life can be much shorter.

If a new battery is to be fitted, charge it fully prior to installing it into the vehicle. Batteries may sit on a parts house shelf for many months before being sold.

 

Hey thanks for replying. I've tried putting in a brand new 900 CCA battery (tested for good voltage and CCA before installing) but to no avail. Problem still exists even after brake calibration and codes erase using my scan tool.

Im now thinking maybe it's the park brake module that's giving me the issue. Am trying to source for a secondhand unit to test now. May i know if the part number on the park brake module has to be exactly the same? Also, any coding works required for the module replacement? Thanks.