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Discussion Starter #1
I have been looking at Range Rovers for a while now and I have found one I really like and test drove it: 2006 Range Rover Supercharged V8 with 60k miles on it.

The tag on the Range Rover is $19,488 (plus taxes, tags, etc.), but when talking with the sales manager, he let me know that they took it to a Land rover dealer and said the "differential module" needs to be replaced and that it's $3,000. He provided the paperwork from the dealer, too.

The error codes on the dash include:
transmission fault stop with care, ABS, park brake, brake, and one that I did not recognize (Triangle with an exclamation point and an arrow going around it).

After reading many of the posts on this forum, it looks like this is a common electrical issue with the brake light switch and/or battery. "Christmas Tree Effect".

The sales manager dropped the price of the Range Rover to $16,488 to accommodate for this fixing. (I drove it and it drove excellently, too).

My question is should I move forward with purchasing the vehicle, thinking it might be the brake light switch, and/or battery first? I would like to think the Land Rover dealer is right, but after reading a lot of the posts on here, it seems like the Land Rover dealer is one of the last places to go with these things. I know if I decide to move forward with purchasing the vehicle, just be ready to spend the $3000 to fix it, although I have found a reputable independent mechanic nearby.

Let me know!
 

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2006-2009 Range Rover Sport
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Offer him $10K and get the items fixed...right now you're buying unknown problems...need to know what codes it's throwing...presumably you're buying from a non LR car shop. Run away! You're buying a heap of problems...
 

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I find this odd. 06 SC shouldn't have a locking rear diff. Does the suspension lower when it faults?

They may be talking about the transfer case motor, which is reasonably priced, but you should get it looked at before you buy it to know what you're getting into... before you buy it.

The DSC light is the one you didn't recognize.
 

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Discussion Starter #4
I replaced the brake light switch, as this is usually the first thing to check when these warning lights come on. This is what it looks like on the inside of the brake light switch. I'm guessing it means the switch was bad, due to the black residue? The lights are still on, though.

Should I next go and get the battery checked?
Brake Light Switch.jpg
 

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Discussion Starter #5
It does say that the suspension is lowering.

I went and got the battery tested and it was good, at 12.59V. What should I do next? I have after market tail lights, so maybe the bulbs are not Land Rover models and I should replace the bulbs to make sure they are the necessary ones?


I purchased the vehicle with these lights on the dash, but it runs fine.
 

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Discussion Starter #6
Went and got MD state inspection today and it passed. Shwoo! I did have them read and reset codes and a permanent one showed up:


0416-94: Invalid data received from vehicle dynamics control module.


thoughts?
 

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That fault doesn't mean much.

The inspection station only interrogated the PCM, which has a fault for bad data from the ABS(usually caused by another fault that is stored in the ABS.

You either need to have it looked at by a shop that knows these vehicles, or at least has the correct equipment to diagnose them, or invest in a proper scan tool so others on here can provide you with advise.

Guessing and checking is really not the best idea with these trucks.
 

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Discussion Starter #8
Well, this inspection station specializes in Land Rovers, which is why I went there in the first place. They told me the same thing the Land Rover dealership told me: the rear differential motor needs to be replaced.

I was just hoping it could possibly be something else that's overlooked because I doubt the extended warranty will cover that.
 

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It does say that the suspension is lowering.

I went and got the battery tested and it was good, at 12.59V. What should I do next? I have after market tail lights, so maybe the bulbs are not Land Rover models and I should replace the bulbs to make sure they are the necessary ones?


I purchased the vehicle with these lights on the dash, but it runs fine.
So you ask if you should buy it with all of these declared faults, much less knowing whether it has other issues, then proceed to buy it without getting a PPI to identify what the entire list of problems you are buying are, and now are trying to ask folks to guess how to fix it, and are disputing the advice of the master mechanic on the board. Why don't you do things in the proper order?

Take the car to get it inspected, identify what the issues are from your Indy Shop, figure out the costs, go negotiate the price and then get the items fixed...and then ask for help.
 

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I just realized this was in the RRS section, which makes a lot more sense, as the locking rear diff was available in 06 for a L320, but not a L322.

If you've had 2 separate, supposedly specialist shops(I don't know of an inspection station that specializes on Rovers in the area, unless you they sublet your inspection out) say that it was the rear diff motor, which is a suspect part, I've replaced many, then you probably need a rear diff motor.

You can try changing out the fluid and driving for a while to see if fresh fluid will lube up the gears/pivot and let a weak motor work, but it's usually too late once it is already faulting, as the motor has been stressed. I strongly suggest changing the fluid when replacing the motor though.

If this were only at start up, it might be worth a second look at the battery/electrical system(ground points) But assuming you're getting the standard P186D fault in the RDCM, and since it is faulting once driving, it's going to be the motor. There is a On Demand Self Test available in proper diag equipment that would confirm, and should have been performed by the shops that have already condemned the component.

See the attached TSB and SSM.
 

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