Greisingel

Yes – 2005 400 Happened once after I blew the main fuse (reverse poled the battery). Fixed it after a long period off road. Since then. Charge always displays minimum 2 red bars. You might benefit from a hybrid battery health check. Or try Dr Prius app? Even after I dried and repaired my HB when it turned into a swimming pool and shorted out, the display returned to normal. Probably nothing to worry about.

that you can yes

Yeah my coolant expansion tank drops over a month by about similar. Probably a weep around the water pump. A classic. Clue is the purple staining. Get a borescope in to check.

My problem was the side of the rad "crack". You'd know as there's always a limescale deposit. Fissure opens under pressure. Replacement job. Not too horrible, though bolts often rusted in.

It was a good question – I too am gonna tackle this.

Exactly same for me on return from France. I bet you have the cracked plastic radiator shoulder. I had to crawl 200 miles on battery, charged with topped up rad and ICE runs watching gauge. Look for the white limescale deposits when you face the top left hand side of the rad

£275 fully comp with PNC for RX400H with 1st Central. That was my renewal – comparison websites were twice as much

There you go – this forum is filled with solvers!

Not sure what to suggest. You are most likely looking at a replacement screen. One troubleshooter said they got results from unhitching the battery lead for 20 minutes – makes no sense to me and is a pain as car has to relearn driving parameters. Go to fleabay and look for 400s being broken up

Looks like the screen LED has gone. Assume it just happened rather than the screen gradually decaying. May be a replacement job. You could go to alixpress which has soe excellent upgrades

Blimey that's decent MPG https://www.fuelly.com/car/lexus/rx400h

When the leaking was out of control. 🙂 I also run the air con cold and hot all the time to keep dry cabin

Yes – I agree. But if you were off to Spain for a fortnight – it might be an option. But you are right – only good if resetting a serious CEL issue as a short term fix or away for very long time.

https://www.amazon.co.uk/Universal-Disconnect-Terminal-Isolator-Vehicles/dp/B075CK7W3Z/ref=pd_ci_mcx_mh_mcx_views_0?pd_rd_w=AJBMG&content-id=amzn1.sym.d63274d0-bf52-45e7-ae69-2bcf85c5865c%3Aamzn1.symc.ca948091-a64d-450e-86d7-c161ca33337b&pf_rd_p=d63274d0-bf52-45e7-ae69-2bcf85c5865c&pf_rd_r=DCVAV0JB0X4HYR6TBV85&pd_rd_wg=KEy6a&pd_rd_r=53d8f9de-97a0-416a-9612-5804d74ee81b&pd_rd_i=B075CK7W3Z

It is not an uncommon complaint. Reckon the HBS chap will get to the bottom of it. May be a straight forward ICE issue, fuel delivery system etc. Or it is linked to the HB in that the engine switches between ICE and EV managed by the Hybrid Synergy Drive system (starter motors etc). Sounds like the electric 'fire up' of the engine may have failed if you were in EV mode on the motorway. I'd suspect it is electrical. Did the dash not light up warnings...VSC ABS HYBRID warning https://us.lexusownersclub.com/forums/topic/93761-2006-rx400h-help-engine-totally-dies-while-driving/ https://www.lexus-tech.eu/HYBRID/HVDM/EN/RX400H.pdf Good luck