NickySB

Thank you all for your helpful responses - i shall do a bit more research and give the 12v battery a good check before continuing with the most expensive option

Hello, I’ve just joined after literally just acquiring a GS450H. I’ve always been a big Lexus fan and I’ve previously had a RX300. Bought the GS to have an Uber comfortable car - 2 reasons really - I am due to have an op soon and will need something bump absorbing as my current vehicles have very little give in them , one is rock solid and one bounces around like a pea on a drum - and also because our Ayrshire roads are so hard and unforgiving, especially in the winter when lorries create craters not pot holes, and it will probably be prudent to have something comfortable regardless of situation or condition. The GS has some hybrid issues at the moment so I shall be occupiying the GS technical area quite a lot.😀 Look forward to chatting with everyone. Cheers Nicky

Hi All, My first post here so please be gentle 😊 Just returning to Lexus and have bought a GS450H 2007 plate. Bought privately so no recourse, but the car has almost instantly developed a hybrid fault - not sure what I’ve done to upset Karma but hey hoe, I shall attempt to describe the issue. I’ve done a fair bit of research regarding this issue, and I’ve found lots of similar cases but I wanted to check exactly what was going on in our instance in case it is something different. So, here’s what we’re getting: When power button is depressed, with foot on the brake, the engine starts. Error messages are received - Check Hybrid System, Check VSC, Check ECB We can drive the car for around 5 minutes, engine only, then the car appears to die. Power steering, dash lights, brakes etc all stay available. (Try putting foot on accelerator and nothing happens so it isn’t still running at that point) We have to then pull over and restart it. Each time it repeats the same. Hybrid system on the central display screen is not showing any energy flow between engine/drive system/hybrid system (apologies if the terminology is wrong I have not got my head around the hybrid system in good detail yet). - the manual describes this situation as No Energy Flow. An OBD reader shows codes P0A80 - replace battery pack & P3016 - Manufacturers control - I believe this code is due to either a faulty HV Battery assy or a faulty battery ECU. Initially hybrid batteries showed as empty, following a drive (repeating this stop/start procedure) they eventually went up to green, and since sitting for a few hours and testing it again they are back to empty. The hybrid battery vent at the rear can be heard running as soon as the car is running so I assume the fan is not the issue. I believe the car had to be jumped before collection, which in ‘normal’ car world (ie not a hybrid) would suggest the 12v battery was in poor shape. I have checked the 12v battery, and it looks to be the Panasonic, which I believe is original, and the voltage on a brief check was measuring around 12.6v. I appreciate that all this points to a damaged hybrid battery pack - but before I go spending some serious cash trying to fix it, I just wanted to check with those in the know whether all these signs are completely symptomatic of a failing HV hybrid battery pack, or could this be more than 1 issue, or am I suspecting the wrong piece of equipment? Thank you in advance Nicky