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D3 high-pitched warning sound when starting to reverse.
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Tom1564
 


Member Since: 05 Nov 2020
Location: Leeds
Posts: 6

United Kingdom 
D3 high-pitched warning sound when starting to reverse.

I often hear a high- pitched warning sound(?) when starting to reverse, usually after being parked overnight. It only lasts for a few seconds and the Disco reverses normally throughout! Any ideas/ suggestions, please?  
Post #238336410th Dec 2024 11:57 am
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10736

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

probably an error tone, that the rear parking sensors are not functioning.

Is a red light on the P> switch, on the center console also flashing when in reverse?  
Post #238336510th Dec 2024 12:00 pm
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Tom1564
 


Member Since: 05 Nov 2020
Location: Leeds
Posts: 6

United Kingdom 

Thanks for the reply - but the reversing beeps are working normally and there is no indication of a fault on the dash...  
Post #238338210th Dec 2024 1:21 pm
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Tom1564
 


Member Since: 05 Nov 2020
Location: Leeds
Posts: 6

United Kingdom 

Apologies, Pete; I've checked again and the 'P' reversing light is flashing! Is it likely to be one of the rear sensors or the console do you think?  
Post #238340110th Dec 2024 6:28 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10736

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Something at the rear

Read the fault codes if you can.  
Post #238340810th Dec 2024 7:56 pm
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raincloud
 


Member Since: 16 Aug 2011
Location: nottinghamshire
Posts: 140

England 2005 Discovery 3 TDV6 S Manual Java BlackDiscovery 3
Re: D3 high-pitched warning sound when starting to reverse.

Tom1564 wrote:
I often hear a high- pitched warning sound(?) when starting to reverse, usually after being parked overnight. It only lasts for a few seconds and the Disco reverses normally throughout! Any ideas/ suggestions, please?
Probably a faulty rear parking sensor or a fault in the wiring loom to the rear sensors
Put the car in reverse whilst in neutral and put your ear up to each sensor - they should emit a ticking sound if they are working - if any one doesn’t then that sensor is faulty unless all are silent in which case it may be the loom - it tends to get damaged by the balance weights  
Post #238341010th Dec 2024 8:47 pm
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raincloud
 


Member Since: 16 Aug 2011
Location: nottinghamshire
Posts: 140

England 2005 Discovery 3 TDV6 S Manual Java BlackDiscovery 3

For neutral read ignition only on! mine was a manual so thinking about how I solved my issue  
Post #238341110th Dec 2024 8:49 pm
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Tom1564
 


Member Since: 05 Nov 2020
Location: Leeds
Posts: 6

United Kingdom 

Thanks, Raincloud. I'll check it out tomorrow.  
Post #238342110th Dec 2024 11:15 pm
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Tom1564
 


Member Since: 05 Nov 2020
Location: Leeds
Posts: 6

United Kingdom 

Yep, found a dodgy sensor. Gave it a whack and a squirt of WD40 and it's now working again (at least for now!)
Many thanks for all the advice.  
Post #238350812th Dec 2024 1:11 pm
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