For what year Jag and model are you requesting info?

 

After searching the JTIS for XK8/R's and not finding the P1572 thought I had better ask. Sorry, can't help.

 

More then likely the brake switch is bad. Yes 1572 is the brake switch circuit.

 

Hi! I also had a P1572 code read today at the shop, on a regular code check while doing others jobs. What "Brake pedal switch circuit malfunction" stands for exactly?, I see nothing wrong with my brake lights nor the ability of the car to stop. Where is the switch located? Is it just a DIY change job or something more complicated?

Finally, is this the switch we are talking about? http://www.autopartsworld.com/cart.asp

I'm sorry formakingso many questions in just one post, but I'm lost in this matter. Thanks in advance!

 

brake switches do more then turn your brake light on and off.

 

Like cruise control.

 

and they also stop tranni upshifting if staying on.. or slightly on..

 

We had a guy that kept coming in with 2004 XJ complaining of no upshifts. Kept driving it and was fine. Eventually went for a ride with him driving. Told him to take his foot off the brake and low and behold....car shifted normally.

 

lol

 

Thanks for your answers, I gotta honestlytell you that I am not mechanical oriented at all, sorry. So, the malfunction could be affecting a series of things, right? Do you thinkthat changing theswitch will solve things out?, and again, is changing it a DIY job or something more serious?, where is theswitch located? Thanks again!

 

Located on brake pedal. There is two of them. You can do it.

 

if it's not the sensor.. i had one where it needed a harness.. hopefully it's the switch

 

mmm... is there a way to check if it's onlya blownswitch?

Two of them? are they equal or each manages different things and have different part numbers?

 

Both different. One activates a few ms before other. If intermittent problem, hard to check. Just replace both.
Easiest way is to have car running and press brake pedal, do not disconnect electrical connector. Turn 1/4 turn ccw and pull them out. Shut car off, disconnect electrical connectors. Plug new ones in then start car. Reinstall and enjoy. Get code cleared.

 

lol

ACM functioning ok Bo?

 

ccw?

 

counter clockwise.