So as it’s cold I ran the pre heater for 15mins before leaving work, got in to a nice warm car, pressed the button to start there wash a few seconds delay which I assumed is due to the cold then she fired up and ran a treat unfortunately that’s when it all went wrong, got loads of faults, adaptive dampers, parking break, gearbox, abs, and lots more, I assumed a low battery so decided to take it for a run to get battery charged up but no I couldn’t as the gear knob was stuck down 😡.

So I plugged in my GAP tool cleared all the faults but they immediately came back up, got my charger on and even asked my local garage to take a look and even with the snap on diagnostic tool all the faults came back, battery was at 11.7 it’s only 2 years old, I’ve left it on trickle charge overnight, hoping it will sort it out but a bit concerned that even the gap tool couldn’t sort it

Apart from low voltage is there anything else I should be looking at

Thanks in advance

Craig 2012 Range Rover Westminster 4.4 TDV8
2006 Discovery 3 HSE 260k miles and still going strong with a new owner

Classic low voltage faults...  Pete

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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Had the car on charge all night turned ignition on still the same results and every time I try to clear the faults half way through the process of clearing I see “update failed” flash up quickly then all the codes stay the same the battery was bought in match 2023 and I got the best I could any ideas is it still pointing to battery

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What are the actual faults rather than the list by ecu and did you do this with the engine running as this will have maintained the voltage via the alternator to eliminate low voltage issues with the GAP tool. 2012 TDV8 Vogue (L322)

Yes tried with running showing 14.2 v I think and still no joy I’ll try to get the faults again and post up 2012 Range Rover Westminster 4.4 TDV8
2006 Discovery 3 HSE 260k miles and still going strong with a new owner

You can export the full detailed list of the faults vie the lower left blue icon. 2012 TDV8 Vogue (L322)

Fault codes

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Most of those are spurious codes thrown when the voltage drops. Replacement batteries from Tayna are not that expensive so maybe worth changing it. At least there's no alternator faults showing. 2012 TDV8 Vogue (L322)

Furnitureman wrote:

Had the car on charge all night turned ignition on still the same results and every time I try to clear the faults half way through the process of clearing I see “update failed” flash up quickly then all the codes stay the same the battery was bought in match 2023 and I got the best I could any ideas is it still pointing to battery

Click image to enlarge

Battery on 12.2 v doesn’t look good to
Me but it started the car no problems

Battery voltage on the screen shot is showing 12.2v after a charge, battery has failed....  Pete

__________________________________________________
2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

Not great for an 18 month old battery but it’s covered by warranty. But even when fully charged inc charger still on the codes won’t clear and you can’t engage gear 2012 Range Rover Westminster 4.4 TDV8
2006 Discovery 3 HSE 260k miles and still going strong with a new owner

Local garage checked the battery and it’s ok so hard reset to do then I’m stuck for ideas almost all the faults relate to list communication with the transmission module, is there a plug that could have got damp like my old disco, need the car to take swimbo for her chemo turning up in the old works can is t going down well 2012 Range Rover Westminster 4.4 TDV8
2006 Discovery 3 HSE 260k miles and still going strong with a new owner