Electronic Parking Brake/Battery
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Senior Member
Joined: Jul 2015
Posts: 142
Likes: 19
From: Ferdale, MI
Electronic Parking Brake/Battery
2005 S Type 4.2 NA - 92,000 miles
After sitting for 2 days my wife goes out to move the car, started it up and it would not move - yellow warning light on and red brake light on - message center reads parkbrake fault - parking brake was locked on and would not release. I went on the forum and did a little research - checked the appropriate fuses then checked the battery voltage. It was reading between 12.3 and 12.5 volts at rest. I removed the battery [apparently the original 12 year old jaguar battery] and took it to my local battery center of America store. Sure enough it was basically shot. I purchased the upgrade model made in America for $130 + tax, took it home and installed it. I then started the car and calibrated the brakes/parking brake [applied brakes 5 times - message changed to apply foot & park brake - lightly applied the footbrake then applied the parking brake using the switch release on the epb lever - the message center cleared and I was able to release the parking brake both manually and by moving the shift lever out of park.
Without the use of this excellent forum I would have probably had towed it to my independent jaguar mechanic and spent much time and money on a cure. I had read about the dreaded weak battery problems but always mistakenly thought that if it had enough power to crank over and start I was good to go. My bad!
As a side note I did momentarily get a restricted performance message a while ago when I jumped on it from a 20 roll but it immediately cleared after restarting. I read and cleared the codes with the borrowed Bosch code reader from my local cheap auto parts store and will see if anything pops back up in the near future.
In short I now believe that one should check battery voltage from time to time as standard maintenance - it's relatively easy with a multimeter which you can often get for free or near free at harbor freight.
After sitting for 2 days my wife goes out to move the car, started it up and it would not move - yellow warning light on and red brake light on - message center reads parkbrake fault - parking brake was locked on and would not release. I went on the forum and did a little research - checked the appropriate fuses then checked the battery voltage. It was reading between 12.3 and 12.5 volts at rest. I removed the battery [apparently the original 12 year old jaguar battery] and took it to my local battery center of America store. Sure enough it was basically shot. I purchased the upgrade model made in America for $130 + tax, took it home and installed it. I then started the car and calibrated the brakes/parking brake [applied brakes 5 times - message changed to apply foot & park brake - lightly applied the footbrake then applied the parking brake using the switch release on the epb lever - the message center cleared and I was able to release the parking brake both manually and by moving the shift lever out of park.
Without the use of this excellent forum I would have probably had towed it to my independent jaguar mechanic and spent much time and money on a cure. I had read about the dreaded weak battery problems but always mistakenly thought that if it had enough power to crank over and start I was good to go. My bad!
As a side note I did momentarily get a restricted performance message a while ago when I jumped on it from a 20 roll but it immediately cleared after restarting. I read and cleared the codes with the borrowed Bosch code reader from my local cheap auto parts store and will see if anything pops back up in the near future.
In short I now believe that one should check battery voltage from time to time as standard maintenance - it's relatively easy with a multimeter which you can often get for free or near free at harbor freight.
Veteran Member
Joined: Feb 2009
Posts: 8,020
Likes: 1,731
From: Sunny South Carolina
Yep, I remember same problem and I believe first time it had been ever posted here with the fix. Congrats on your research and easy semi cheap fix!
https://www.jaguarforums.com/forum/s...e-stuck-32699/
https://www.jaguarforums.com/forum/s...e-stuck-32699/
Last edited by joycesjag; Mar 13, 2017 at 01:12 PM.