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Engine cut out
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GreatWhenTheyWork
 


Member Since: 26 Jun 2023
Location: Kent
Posts: 29

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Barolo BlackDiscovery 4
Engine cut out

Good morning, just got in after being recovered home, driving along when engine light came on followed by a message critical engine fault then engine cut off, scanned and had P250A & P0195 codes.
Car will turn over but will not fire. ?
Recovery man checked fuel line nipple, wet but no squirt of fuel.

Any advice appreciated
  
Post #236503624th Mar 2024 3:51 am
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GreatWhenTheyWork
 


Member Since: 26 Jun 2023
Location: Kent
Posts: 29

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Barolo BlackDiscovery 4

Update, so had car scanned again and looks like a fuel pressure issue, actual pressure on cranking starts at approximately 32 psi going up to around 55 psi ish, car looking for 233. Psi If I remember correctly.

Any advice appreciated.
  
Post #236505424th Mar 2024 1:43 pm
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Fireburst
 


Member Since: 02 Nov 2017
Location: Hertfordshire
Posts: 187

England 2012 Discovery 4 3.0 SDV6 HSE Auto Orkney GreyDiscovery 4

Check Robbies guide to low pressure fuel pump, I think you will find the pressure at the schrader valve is much lower than you mention.

I thought I had a fuel pressure issue recently when my engine cut out while I was driving, it turned out to be the Crank shaft position sensor. Car has been running fine since the sensor was changed.
  
Post #236510325th Mar 2024 10:57 am
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GreatWhenTheyWork
 


Member Since: 26 Jun 2023
Location: Kent
Posts: 29

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Barolo BlackDiscovery 4

This is just the kind of info I need, thank you.
I’m slowly reading threads and applying to the car when time permits.
The crank position sensor was changed under the recall about 3 months ago, Barrettes Ashford.
  
Post #236510625th Mar 2024 11:16 am
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Hardware
 


Member Since: 28 Jun 2016
Location: Hiding under the M60
Posts: 12830

United Kingdom 2011 Discovery 4 3.0 SDV6 XS Auto Sumatra BlackDiscovery 4

this is what you need to read https://www.disco3.co.uk/forum/topic130062.html .... apologies if you're already working through it
  
Post #236511525th Mar 2024 12:08 pm
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GreatWhenTheyWork
 


Member Since: 26 Jun 2023
Location: Kent
Posts: 29

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Barolo BlackDiscovery 4

Hay no worries, all help welcome Thumbs Up
  
Post #236515825th Mar 2024 10:03 pm
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Browny90
 


Member Since: 19 Jul 2016
Location: Ashbourne
Posts: 690

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

Hello mate, How are you getting on?

Just curious Laughing

I assume something like the position sensor or the FP belt snapped? Although I don't think it's common, still possible..
 Disco4 MY16 SDV6 Landmark Black
Disco4 MY12 SDV6 XS Orkney Grey (Gone)
Defender 90 200tdi Completely rebuilt. 
 
Post #236518626th Mar 2024 10:33 am
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GreatWhenTheyWork
 


Member Since: 26 Jun 2023
Location: Kent
Posts: 29

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Barolo BlackDiscovery 4

Hi, no further on.Between work and family not had time.
Will keep forum updated though.
  
Post #236524626th Mar 2024 11:15 pm
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GreatWhenTheyWork
 


Member Since: 26 Jun 2023
Location: Kent
Posts: 29

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Barolo BlackDiscovery 4

So, checked for crank movement from under the vehicle after removing guards and cooler thingy.
No movement.
Checked lpfp, running and pulling 7 amps. I’ve not got a gauge to fit the test pointin the engine bay.
  
Post #236541629th Mar 2024 4:54 pm
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Browny90
 


Member Since: 19 Jul 2016
Location: Ashbourne
Posts: 690

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Santorini BlackDiscovery 4

I think you need to check the HPFP belt..

It certainly seems like you e snapped the belt..

It’s not an impossible job with the body on, just awkward.. but you only need to get as far as taking the cover off to check to start with..
 Disco4 MY16 SDV6 Landmark Black
Disco4 MY12 SDV6 XS Orkney Grey (Gone)
Defender 90 200tdi Completely rebuilt. 
 
Post #236542029th Mar 2024 5:48 pm
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GreatWhenTheyWork
 


Member Since: 26 Jun 2023
Location: Kent
Posts: 29

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Barolo BlackDiscovery 4

Yes, that’s my next port of call.
Will update soon.
  
Post #236543230th Mar 2024 1:15 am
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Fireburst
 


Member Since: 02 Nov 2017
Location: Hertfordshire
Posts: 187

England 2012 Discovery 4 3.0 SDV6 HSE Auto Orkney GreyDiscovery 4

Hi, just curious about how you can eliminate the crank sensor by checking for movement? When mine went it was simply a failure of the sensor not a visible problem with the sensor.

Good luck with finding the fault, I changed the alternator, starter motor and battery before I found it to be the crank sensor on mine. My iiD tool just kept showing no faults!
  
Post #236545430th Mar 2024 12:21 pm
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GreatWhenTheyWork
 


Member Since: 26 Jun 2023
Location: Kent
Posts: 29

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Barolo BlackDiscovery 4

Hi, the crank sensor has been replaced approximately 3 months ago by main dealership. Unless it’s gone bad. I was checking the crank movement for crank shaft failure.
  
Post #236549631st Mar 2024 2:49 am
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GreatWhenTheyWork
 


Member Since: 26 Jun 2023
Location: Kent
Posts: 29

United Kingdom 2012 Discovery 4 3.0 SDV6 HSE Lux Auto Barolo BlackDiscovery 4

Update, following Robbie’s thread….
Lpfp is pumping 1.4 Ltrs in a minute.
Pump pressure at the test point in the engine bay is a steady 6 psi, while cranking.

I rigged up a fuel pump and fuel supply to feed into the test point, the engine did try to fire twice but that was it.

I still need to dig into the engine bay and check the hpfp belt, a job for the weekend.

Could it be an issue with a cam position sensor ?
  
Post #23657543rd Apr 2024 7:01 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: Lost
Posts: 4851

Ukraine 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Are you getting any codes other than the ones for the oil temp and level? What is the battery voltage?

Make sure you include "pending faults" when scanning.

If the HPFP belt had snapped there will be a code for the high pressure fuel rail "system pressure low" or actuator stuck, I'm wondering if your problem might bigger than that?
 yµ (idµ - eAµ) ψ=mψ

 
 
Post #23657613rd Apr 2024 7:52 pm
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