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Gearbox fault code P0400-00 SOLVED
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Discomadness
 


Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256

Wales 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3
Gearbox fault code P0400-00 SOLVED

Evening all.
Can anyone shed light on a gearbox fault code that won’t clear after replacing the gearbox ? I’ve recently had the body off to replace the gearbox, I’ve topped the oil up with the engine running but not at temperature yet as I’ve not driven the car, I’ve cycled through the lever positions though.
Is this a calibration issue or something ? I’ve not done a steering angle sensor calibration yet don’t know if that makes a difference.
Thankyou all. Thumbs Up


If you all want to avoid the reading. I hadn’t plugged the near side wheel speed sensor in all the way. Embarassed Jarrod

Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE. 

Last edited by Discomadness on 18th Dec 2018 5:11 pm. Edited 1 time in total 
Post #200951615th Dec 2018 4:50 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10673

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

there are 2 sensors ontop of the megatronics unit.

It would appear the rear sensor is faulty at a guess.


The megatronics unit can be dropped while the gearbox is still in the car.

You may as well drive it, to see if there are other issues  
Post #200952815th Dec 2018 5:18 pm
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Sea Raider
 


Member Since: 01 Nov 2016
Location: None
Posts: 4450

Thought the speed sensor fault code referred to one of the speed (or ABS) sensors on the wheels
Have you checked live values for the wheel speeds?




This was my speed sensor fault  
Post #200953015th Dec 2018 5:28 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10673

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

well yes, but as the gearbox is generating the code (not the ABS) .....

(example) fits ontop of valve body
https://www.ebay.co.uk/itm/BMW-X5-Range-Ro...Swp6lbfUT4


I reckon is the grey dome, not far from the main connector.

Maybe you could use your old megatronics unit?  
Post #200953215th Dec 2018 5:31 pm
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Discomadness
 


Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256

Wales 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

You’ve got me wondering now guys. Did I reconnect my rear wheel speed sensors.... Embarassed

Somethings nagging at me that I haven’t.... where are they connected is it by the flexy from body to chassis ? I’m home now so will have to check in the morning. If that’s the case I will feel rather foolish.

As for the mechatronic unit,
When I managed to crack the pump gear on this box I took it to Bristol trans who did the repair, they swapped the mechatronic ecu’s over and said that it past testing to I’m guessing it should ok. Would that sensor have been swapped over as well ? Jarrod

Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.  
Post #200953515th Dec 2018 5:47 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10673

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Sensor is part of megatronics unit.

Hope it’s you rear wheel sensors  
Post #200956315th Dec 2018 6:21 pm
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Discomadness
 


Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256

Wales 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

I’ll go over it all in the morning. In my defence there’s a lot of plugs to rememeber to reconnect. Whistle Jarrod

Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.  
Post #200956415th Dec 2018 6:23 pm
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Discomadness
 


Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256

Wales 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

So it turns out after a quick road test that the near side wheel speed sensor wasn’t giving a reading. Turns out I hadn’t made the plug fully home. Little bit embarrassed but it’s all sorted now.
 Jarrod

Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.  
Post #201050318th Dec 2018 5:13 pm
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ianm27
 


Member Since: 02 Jun 2016
Location: Hertfordshire
Posts: 2154

England 2012 Discovery 4 3.0 SDV6 GS Auto Orkney GreyDiscovery 4

May be a slightly embarrassing situation but............

its fixed and no cost - result Thumbs Up Uncle Ray's spare wheel protector
Limo Tint
Blackvue front & rear dashcam
Cruise control switch pack
Bodsy's remote for FBH  
Post #201050718th Dec 2018 5:18 pm
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Sea Raider
 


Member Since: 01 Nov 2016
Location: None
Posts: 4450

Result - well done Thumbs Up  
Post #201051218th Dec 2018 5:21 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 10673

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

Phew!  
Post #201062718th Dec 2018 7:34 pm
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Discomadness
 


Member Since: 19 Jan 2015
Location: Caerphilly
Posts: 2256

Wales 2007 Discovery 3 TDV6 HSE Auto Buckingham BlueDiscovery 3

Phew indeed ! Had a few 50p/£1 days there.... Thumbs Up Jarrod

Current : D3 2007 HSE - AKA the lemon
-beanie grille
-detango with led bulbs
-club body off rebuild. TWICE.  
Post #201063318th Dec 2018 7:43 pm
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