First thing I have to say thank you all for posting lots of ideas, brainstorming ideas, engineering ideas to solve many complex technical cases from Discovery 3 and 4. No textbooks even from LR gurus who designed Disco 4.

My Disco 4 is 2011 #260000km, special edition of black and white in contrast in and outsides. Amazingly, this version is very much different from Disco 3 with diesel economical (8l/100 Hw), quiet if cruise driving, good insulation for snowy trips when sleeping in car, ZF gearbox for this model is very smooth responsive, off road is intelligent no problem if using low profile tyres... Many reasons why I never think of selling it. I love it like a member of my family.

However, it is getting old by days and become sick very often. I always look after it with tune up and services with my schedules even very expensive ways. I love mechanics both modern and conventional; To fix simple errors with listening, noticing strange noises, syndromes and conclusions of main sources to the problems those I learn/apply from my IT.

I do not know why AULRO did not allow me to express my ideas just until now. I figured out better approach to alter turbo oil pipe because bad design from LR, I did replace manifolds myself because dealer's quote was too high (> AUS$ 10000 and plus replacing timing belt $2500) I did not replace oil cooling housing ($600 for part and $400 labour) but I did just a set of seals ($12 China made) and importantly I found out reasons seals were collapsed.
I am proud of fixing error "Turbo shut off vale open" while dealers insisted turbo faulty and this was Restricted Performance. I modified throttle body to prevent leaks from Y piece joint with its body. My alternator sudden died, I replace carbon brushes. All I did because I do not like amateur technicians to touch sensitive and clean parts with dirty hands and sometimes destroy my bolts and nuts with unnecessary extra torque.

A week before 18th JAN 2025, I thought I must give up the repair of P006-00 error with Restricted Performance. It cost me a week to find down the MAF sensor problem and it is not the MAP sensor even error description confirms MAP corelation.

I am still learning... I appreciate "Eric SDV6SE", "Graeme", "v8sruleok", "Scott"...with their analysis abilities and also experiences in many different fields.

I will record how to repair an error next time.