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Lexus RX 400h: Problems & Solutions
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I have not noticed any changes in Mileage, but all the radio presets and Avg MPG in the energy menu have been resetted. Do you really think it needs to be reprogrammed? And if so what do they reprogram?
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The 12 volt battery in your RX400 is kept charged via a voltage downconverter/inverter from the hybrid battery.
Too much battery loading, battery too big, might destroy the downconverter.
One other note.
They did reprogram something which made the rear power windows work from the driver's door switch as well as the roof which started to function properly
anyone has any experience or info?
btw, love the car, rides great, a couple unusual feelings and noises but we were prepared as had read about them in this forum
At speeds over 30 MPH there is s noise coming from the back that sounds a little like a metallic fluttering. I thought it might be a tag or something loose underneath, but nothing found. With someone in the back seat to help listen, it seems to be narrowed down to coming from under the seat, which would mean possibly something in the battery area. Could it be something with the battery ventilation operation?
Anyone else have a similar experience?
At speeds above 60 the road noise takes over and most of the time I cannot hear it. So I know, the solution is to drive fast!
jc
The only shortcoming I can see would be the possiblity of overheating the catalyst when the ICE is REQUIRED to run continuously. Seemingly that problem could be easily overcome via the activation of a blower system to reduce the overheating probability.
More weight and complexity but that would be more than overcome by the improvement in FE.
I went to the dealer to pick up my registration paperwork (things are a little different in Florida) and I was going to have them look at the noise. On the way there, I could not hear the noise, so I didn't take it to service dept. Of course on the way back on the turnpike, there was the noise.
So I followed your information and sure enough, the heat shield. It is just thin metal and is secure on the outboard side. On the inboard side it flexes and is close enough to the underside of the car that certain wind conditions cause it to flutter and make the noise. I bent it down slightly and no more noise. When I take it in for first service I will see if they have something to make it more secure.
If they don't have it, sounds like (OK, pun intended) they need a service bulletin on the problem.
jc
However, this still would not help the short trips, since the converter still has to warm up for the first time...
Keep us all posted! I don't want to sell the car as a used car within 6 months of purchase.
Thanks
During this last visit to the dealer they provided me with a loaner 400H with 25,000 miles and it did not have the smell. I would prefer to stay with the hybrid engine if it is just my car that is the lemon. But, it sounds like they do not have all the bugs out of the hybrid engine yet.
And by the way unless you're really diligent about turning the A/C off it normally operates all the time.
Thanks,
ke2fe
http://www.alldata.com/tsb/Lexus/1118214000000_1129878000000_EG010-05/index.html-
But after trying the procedure (ignition ON, move gear lever to "N", within 10 seconds hold down door lock for 5 seconds) I wasn't able to change it to "lock on vehicle speed".
Anyone else tried this and is there a special trick to getting it to work?
thanks.
For example, here in the Lexus RX 400h Group youwill now find:
Lexus RX 400h Test Drive - What Did You Think?
New Lexus RX 400h Owners - Give Us Your Report
New Lexus RX 400h Engine Problems
RX 400h Navigation/Bluetooth Issues
Changes You'd Like To See in the Lexus RX 400h
Lexus RX 400h Brake Issues
Lexus RX 400h: Driving Tips & Tricks
Lexus RX 400h Transmission Questions
Lexus RX 400h Tire/Wheel Questions
Lexus RX 400h Suspension/Steering Issues
Lexus RX 400h: MPG-Real World Numbers
to mention a few of the new discussions.
When you are ready to post, please check the dicussion list here at the main Lexus RX 400h Group page to find the appropriate discussion to post in. Should you have an issue or question that doesn't seem to fit an existing discussion, please feel free to start up a new one.
Thanks for your understanding and help in making this group a great source of info!