Hello, I sure could use some help...

On a cool morning my Lexus LS400 1998 will not go, engine runs but will not accelerate past very slow. If I let it run for about 5 minutes and turn it off several times it is good to go until the next morning or late afternoon.

VSC and Check engine light comes on.
The error codes read at a local auto parts store: Throttle Control (P1129); Electrical Clutch (P1126); and Catalytic Converter Bank 1 Front Motor (P0420). Also the gas gauge is inaccurate.

I checked with Lexus on the Throttle control and they told me that Lexus warrants this problem but the error code must be showing and I have to schedule a repair. By that time the error does not show on the dashboard.

I have 313,000 miles on the car and just hate to part with it. I do all the maintenance on the auto every 3,000 miles and transmission every 15,000 miles.

Has anyone experienced this and resolved the problems.

Thanks for your help.