My cars becoming a wallet wacker, do all X350's fall apart at 100,000 miles? Anyway a few days ago my rear parking sensors started bleeping for no reason when reverse was selected, then there was a bleep when R selected silence then random bleepage when reversing, then they worked fine a few times, now they bleep continuously when in drive and the front ones bleeping occasionally. Luckily there is a mute switch in the head liner.

I am guessing it's not going to be a £20 sensor replacement.

Can anyone be kind enough to shine a light on it please?

 

not sure, but my front sometimes gives me erroneous beeping say when i'm stopped, and a car pulls alongside me...not anywhere close, mind you. i'm thinking that maybe they're just really sensitive. I can pull up to a wheelstop...nothing, then BAM constant beep, then move a few inches further and silence again. Its like the radar is either reflecting off of something to give false readings. Unlike the traditional ultrasonic, I think this is a little different when the adaptive module is installed.

 

thanks H20boy but its definitely a fault of some sorts, annoyingly its intermittent too. would really appreciate some pointers in the right direction. i have dropped her in reverse and checked that all the sensors are chirping and seem ok.

 

"now they bleep continuously when in drive and the front ones bleeping occasionally"

Please explain this.

Do you mean the rear ones bleep occaisionally?

Do the front give one long continuous beep as long as D is selected?

 

No, they don't ! However some annoying faults can appear as I already know with my car, and not at 100k either !

Try disconnecting each sensor in turn to see which one is a rogue. Other thing is to make sure they are really clean and free of crud, but I expect you have done this already.

 

i did mean the rear ones bleeped continuously and the front started to make the occasional bleep as i was driving along at 30-40+ MPH. now they've stopped doing this. intermittent fault = faulty control module thingy(my technical name for an expensive electronic control unit)?

 

If the rears beep continuously when you have selected reverse then in all probability you have two failed sensors.

If you wish you can pull a fuse to stop the noise for the time being.

When you start the repair, you need to lower the rear bumper to give access to the sensors

Replace fuse,ign in posn. two, reverse selected.

Substitute two sensors one at a time until noise stops and system works normally.
Used sensors are available,the ones on e bay are expensive IMO.
I paid 20-25 GBP for used ones

 

I am getting exactly the same fault with my X350 XJ6, with 66k on the clock. When in slow moving traffic I'll suddenly get the parking sensor going off randomly, sometimes quite a long tone, then staccatto etc., until we start moving again, then it stops, starting again as the speed drops to 5mph or less. If it's doing this I just switch them off with the overhead isolator, and they all seem to work quite well when actually parking, when I've switched them back on, although the front ones do seem to leave it late.

I think the battery is probaby original and now 8 years old (I've had the car 3 months), and although I have no starting issues, and generally travel 25+ miles, does anyone feel it could be a battery thing, or are we back to sensors?

I don't have adaptive cruise or anything so fancy.

 

Check the parking module in the boot has not been water damaged.

The sensors are the weak links in the system is all I can say.

 

That "going off in slow traffic"

One of mine went through a phase of bleeping, when I was stationary in traffic, and vehicles were moving past in the next lane. That sensor later failed.