Jaguar XK8 2005 beeping/no reverse sensors working.

sounds like the j gate is faulty poss the release solenoid or wiring from memory i think the signal to release the gearshift comes from the abs module on the can network.

you can check the sensors by putting in reverse with ign on no engine running. and listen to each sensor in turn put your ear close to sensor it should click very faintly any that don't are poss faulty does the sounder emit a error tone one long beep if not check for water in the module located in boot against rear panel.if that's ok the sounder may have gone down

Hello
Check the sensors , you still might have bad one in the group which will effect the full function of the sensors.

If sensors are good , then you need to check the position of the sensors and set up correctly as if one of the sensors is out of alignment , it will cause this problem.

If not , the you need to check the electrical wiring for the sensors

hello i would like to help but can you give me information on the sensor kit you installed. some systems to beep and some only beep when the sensors detect something. also if they work fine with out the engine running but then don't work properly when the engine is run this could be there is to muck voltage for the sensors, some sensor kits are saying they are 12v, this is correct 12 volts, but the charging system on most vehicles are 14 volts, so you may have to fit a regulator to the feed wires to the sensor. you would need a 12 volt regulator board. this will stop any power going over the 12 volts to the device.

it sounds like the control modual for the sensors could have a issue, have you had a software upgrade from the dealer yet?

I find the sensors only activate when you are very close to an object behind you. At about 5 inches they beep constantly. Further then five inches they beep slower and slower until they stop at about 8 inches from something behind you. If you are very close to an object lest then 2 inches they will beep constantly. Also when you start your car and put it in reverse and you hear a beep the reverse sensors are not working. The best way to test them is to turn the key to the start position but do not start it. place the lever in R get out or have someone walk in back of the car, you should hear the sensor go off. Also, there might be a situation when one or two are not working. Follow the procedure above for test but have a stethoscope mechanic type, which most auto parts stores carry. and listen to each one individually. If one is not working it will have to be replaced. The control module for this system is in the trunk next to the spare tire. Some of these cars had a leaking trunk problem in 02 if the module is wet, get a new one. If it hasn't failed it will when they get wet. Finally the sensors should be heard inside and outside the car.

Most likely the lock out switch at the brake pedal is at fault, because in order to put it in in to any gear you have to step on the brake first ! Their is a switch located which prevents you put it in gear with out stepping on the brake pedal, so check this switch first.

ALWAYS engage the Parking Brake BEFORE putting car into "Park". When you want to get out of "Park", put your foot on the brake pedal, move gear shifter into desired gear, THEN take down Parking Brake. If you get stuck (gear shifter doesn't move), then try the "rocking" method (recruit 1 or 2 folks to push your car from behind while you try to move gear shifter into desired gear). Good luck!

Thats the fail for the sensors, try puting ingnition on, dont start the car, then put it in to reverce  and put your ear to the sensors check them all they should click any that dont are faulty   D 

Sounds to me like all of your problems are electronic, i would definitely recommend this car to go to the shop to be checked out.