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D4 Electrical Issues - Car Won't Start - Based in Kent
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idlewis
 


Member Since: 03 Apr 2016
Location: Kent
Posts: 14

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Corris GreyDiscovery 4
D4 Electrical Issues - Car Won't Start - Based in Kent

Hi All - I hope someone can help me diagnose an issue and also to recommend some garages who can help with the following:

I've had a couple of issues with my 2016 D4 over the past couple of weeks, and I'm not sure if the first issue has caused the second issue.

The first issues was quite simple - and was the known problem of the engine cover fouling the top radiator hose which resulted in a small hole and some coolant loss. Nothing major, and this was easily fixed with a replacement hose (plus grinding off a bit of the engine cover) and the car was running fine for a few days. However, some water/antifreeze mix did splash about the engine bay for a while and I am wondering if this has now caused my second more major issue which started a few days after replacing the hose....

...which is the car now won't start. The brake pedal is solid and the car's electrics turn on OK when pressing the start button, but the car doesn't turn over. It's very similar to this thread:
https://www.disco4.com/forum/topic183907.html

I've got some error codes which I can share when I am back at home.

I wondered if it was a dodgy earth strap, but putting a jump lead from the -ve terminal to the engine block made no difference. I am worried that the coolant leak has got into the control units and caused some damage?

I appreciate this is hard for anyone here to diagnose, so I am also after recommendations for garages in Kent (I am near to Ashford) who are good with such electronic woes? I usually use AHL in Ulcombe but they are booked up into June so I am after alternatives, or a good mobile mechanic, as the car is currently a non-starter.

Any help or suggestions much appreciated!

Ian.  
Post #22281804th May 2021 12:01 pm
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Gareth
Site Moderator 


Member Since: 07 Dec 2004
Location: Bramhall
Posts: 26701

United Kingdom 

First make sure you press the brake hard. If the vacuum servo is depleted for any reason you will need to press harder.

Second, is it in Park? It should be, but the knob can stick or fail.  
Post #22281974th May 2021 1:54 pm
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idlewis
 


Member Since: 03 Apr 2016
Location: Kent
Posts: 14

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Corris GreyDiscovery 4

Hi Gareth.

I was pushing the brake pedal with all of my might, but it made no difference. And the car is in Park. Here are the error codes as supplied by the AA bloke:

System : Engine control - 8MS / Diesel EDC 17CP55.2
Status :P0850 - Park/Neutral switch. Error Message : Signal plausibility not OK. Historical fault.
Status :P2BAE - NOx overshoot monitoring. Error Message : Malfunction. Historical fault.
Status :P2BAF - NOx catalytic converter control loop. Error Message : Malfunction. Historical fault.
Status :P0A0F - Engine does not start. Error Message : Faulty operation. Error sporadic.
Status :P0671 - Glow plug, cylinder 1. Error Message : Internal fault. Error sporadic.
Status :P0672 - Glow plug, cylinder 2. Error Message : Internal fault. Error sporadic.
Status :P0673 - Glow plug, cylinder 3. Error Message : Internal fault. Error sporadic.
Status :P0674 - Glow plug, cylinder 4. Error Message : Internal fault. Error sporadic.
Status :P0675 - Glow plug, cylinder 5. Error Message : Internal fault. Error sporadic.
Status :P0676 - Glow plug, cylinder 6. Error Message : Internal fault. Error sporadic.
Status :P064C - Glow duration control unit. Error Message : Internal fault. Error sporadic.

Thansk,
Ian.  
Post #22282004th May 2021 2:03 pm
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nigethecat
 


Member Since: 11 Sep 2016
Location: Marnoch
Posts: 4145

Ukraine 2016 Discovery 4 3.0 SDV6 Commercial XS Auto Corris GreyDiscovery 4

Previous thread with exactly the same issues as you said...

https://disco3.co.uk/forum/failure-start-s...s+%3AP0671

Looks like you'll need a new gear selector Crying or Very sad I want to see the sweets before I get into your windowless van... I'm not stupid!

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Post #22282034th May 2021 2:08 pm
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idlewis
 


Member Since: 03 Apr 2016
Location: Kent
Posts: 14

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Corris GreyDiscovery 4

Hi nigethecat,

Thanks very much for the link to that thread - your forum search skills are better than mine as I didn't come across that one Smile It does look like my issue, so perhaps that is the module that's given up on my car.

I'll bump that thread in case the OP (crasha) is still about, as I will be interested in seeing how he got on last year.

Thanks,
Ian.  
Post #22282254th May 2021 4:58 pm
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Drezic86
 


Member Since: 01 Jul 2020
Location: Wiltshire
Posts: 20

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Auto Santorini BlackDiscovery 4

I would also try a new brake switch - these can be picked up very cheap and can give the same problems as you are experiencing I believe. I bought my spare from the company below.

https://www.powerfuluk.com/vehicles/land-r...h-oem.html  
Post #22283795th May 2021 12:29 pm
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Famousfive
 


Member Since: 12 Aug 2014
Location: Southampton
Posts: 1809

Ukraine 2013 Discovery 4 3.0 TDV6 GS Auto Loire BlueDiscovery 4

This may be similar too Thumbs Up Thumbs Up

https://disco4.com/forum/2015-d4-wont-star...ight=earth Stolen - D4 Loire Blue
D4 Bali Blue  
Post #22283805th May 2021 12:35 pm
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Nasher
 


Member Since: 07 Mar 2009
Location: Clanfield, North of Pompey - UK
Posts: 2686

England 2016 Discovery 4 3.0 TDV6 HSE Lux Auto Loire BlueDiscovery 4

Some more detail here too:

https://www.disco3.co.uk/forum/earth-strap-failures-194439.html Heaven doesn't want me, and hell is afraid I'll take over.  
Post #22284045th May 2021 3:02 pm
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idlewis
 


Member Since: 03 Apr 2016
Location: Kent
Posts: 14

United Kingdom 2016 Discovery 4 3.0 SDV6 Graphite LE Auto Corris GreyDiscovery 4

Thanks very much for your replies Nasher, Famousfive and Drezic86!

I had a go at using a temporary earth cable from -ve terminal to the engine, but no joy, so I guess my earth strap is still OK.

The brake switch is only £19 so I'm tempted to get one and fit it and see - might save me fair bit of money in the long run if it is that.

Thanks again all.

Regards,
Ian.  
Post #22284245th May 2021 5:35 pm
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Gary_P
 


Member Since: 03 May 2016
Location: Kent
Posts: 1521

Ukraine 2016 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

Hi Ian
Did you resolve this? Was it the brake switch?
Had a similar issue this morning.
Thanks Gary
-------------------------------------------

Discovery 4 HSE 2016MY  
Post #227392420th Jan 2022 5:44 pm
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