Hello all. I am in the U.K.
I recently picked up a 2008 L322 3.6 TDV8. 103,000 miles on the clock. It’s been off the road a few years.
It’s in Limp module with multiple fault codes for invalid Data.

Park brake disabled. HDC inactive. Transmission fault….. every fault under the sun displayed.
I have tried another fully charged battery, but it didn’t help. (I known a low battery can trigger lots of electrical faults).
Also oddly the brake lights all stay on when the ignition is turned off. This may be relevant or an unconnected issue.
I have other L322, so I am not at all new to the model, but I wouldn’t call myself an expert either.
But based on so many faults, I do suspect a bad module somewhere or Can Bus error of sorts for so many communication errors.
I have added some screen shots of the error codes. If anyone has an idea which module might be bad/ or point me in the right direction?
I thought I might be able to exchange parts from my 07 to test things out? Or would they need “programming”?
Any help much appreciated.
If this topic is already covered, then by all means share the best page to look at?

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Further information, a past owner has replaced the ignition key switch/ barrel.
Reading some other posts, it’s been suggested to other similar faults.
It hasn’t fixed the fault on this car though. 2007 L322 TDV8 3.6 Vogue SE
2006 L322 S/C 4.2
2003 L322 TD6 Vogue with Facelift conversion
2000 Discovery 2 TD5 ES. Daily
1990 RRC 3.9 V8 LPG
Too many Jaguars!

Have you tried looking for signs of rodents that might have had a go at the wiring and/or water ingress under the dash and in the boot where most of the modules live ?

Thanks for the suggestion. I haven’t yet, but I get the impression the car went off the road due to the electrical issue, as opposed to the issue occurring whilst it was off the road. 2007 L322 TDV8 3.6 Vogue SE
2006 L322 S/C 4.2
2003 L322 TD6 Vogue with Facelift conversion
2000 Discovery 2 TD5 ES. Daily
1990 RRC 3.9 V8 LPG
Too many Jaguars!

I had a look at the BCM under the passenger seat today. Just to see if there was anything obviously up with it. Only a little very minor corrosion on the big pins on the female end of the plug. I cleaned them up, plugged it back in, but it didn’t help.
Also I checked the alternator is putting out a good voltage at 14.1v at idle. (That’s on a fully charged battery).

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I did check the modules in the boot. Left side. Everything works there, Sat nav, Bluetooth, TV etc. No evidence of water damage there.
There was some damp in the spare wheel well, around the air compressor. I dried it out now. But it’s hard to imagine that could cause these issues 2007 L322 TDV8 3.6 Vogue SE
2006 L322 S/C 4.2
2003 L322 TD6 Vogue with Facelift conversion
2000 Discovery 2 TD5 ES. Daily
1990 RRC 3.9 V8 LPG
Too many Jaguars!

If water evaporates, it will rise up until it hits something to condensate on.
So checking at least the plugs to various modules wouldn't hurt. You could stick them in an oven on low setting with the modules being open so moisture can escape.

That's my uneducated guesses at trying to progress things that wouldn't cost anything.
Buying different modules could be quite the expense without possible results other than loosing money.