Land Rover Discovery's Electrical Nightmare: Multiple Failures

Hey there! I went through something similar with my 2005 Land Rover Range Rover diesel. Some experience with car maintenance here, I do basic stuff myself but leave the complex issues to pros. I had basically the same symptoms, multiple warning lights and electrical gremlins popping up all over. Turned out my cold shut-off valve was faulty, which was causing all sorts of weird electrical issues. Got lucky as it was covered under an extended warranty, so didn't cost me anything. Quick question though, have you noticed any other symptoms? Like rough idling or starting problems? Also, have you recently had any work done on the electrical system? These details would help pinpoint if we're dealing with the same issue. Land Rovers can be tricky with electrical stuff, but usually, it's something specific causing multiple warnings rather than several separate problems.

Thanks for sharing your experience! My Disco has 139950 KM on the clock and was just serviced last month. I haven't noticed any starting issues, but now that you mention it, there's a slight rough idle when the engine is cold. It's interesting you mentioned the cold shut-off valve, I've been wondering if it could be something similar or maybe the alternator acting up. Haven't had any recent electrical work done, these issues just started popping up out of nowhere last week. Did your Range Rover show any battery voltage fluctuations before the valve issue? It's really helpful to hear from someone who's dealt with similar symptoms!

Hey again! Thanks for those details about your Disco. You know what's interesting? My Range Rover was actually showing similar symptoms around the 140K mark too. And yes, I did notice some voltage fluctuations before the whole cold shut-off valve drama, but I initially ignored them (big mistake!). Given what you're describing, especially that rough cold idle, I'm even more convinced we might be dealing with the same issue. The way these symptoms just popped up suddenly is exactly how it happened with mine. The battery voltage would sometimes drop a bit, particularly when idling with the AC on. One thing I forgot to mention in my first reply, before getting it fixed, I tried cleaning the battery terminals and checking all the major fuse connections (it's always worth a shot, right?). Didn't solve the problem, but good to rule out the simple stuff first. Just curious, have you noticed if the warning lights get worse when you're using multiple electrical components at once? Like when you've got the AC blasting and the radio on? In my case, this was a dead giveaway that something wasn't right with the electrical system. Trust me, I feel your pain with these Land Rover electrical gremlins, but at least they're usually fixable once you pin down the actual cause!

Thanks so much for all this detailed info! Yes, actually, I have noticed the warnings get way worse when multiple electrical components are running, especially with the AC on full blast! That's really eye-opening about the voltage fluctuations being an early warning sign. I'll definitely check those battery terminals and fuse connections before heading to the workshop, always good to start with the basics, right? And knowing your experience with such similar symptoms around the same mileage is super helpful. I'll make sure to mention the cold shut-off valve possibility to my mechanic when I take it in. Really appreciate you taking the time to share your experience, it's made me feel much better about dealing with this. At least I know I'm not alone in the Land Rover electrical gremlins club! Will probably try to get this sorted next week before it potentially gets worse. Thanks again for walking me through your experience, it's been incredibly helpful!