anthraciteboy

I have replaced the spark plugs and unplugged the battery in that order. I have done both but not unplugged the battery then replaced the spark plugs. Will this not work if it was the problem in the first place. Thanks

Henry

gs4mock2

the same thing happened to me .......i use the scan tool and cleared all codes, instead of the code that came up,because of this a half block later the vsc ligh came on,long story short.there are code in the comp that are not supposed to be erased

anthraciteboy

GS4mock2 - So how did you fix the problem?

Thanks

Henry

gs4mock2

i found someone that had a lexus scanner.if you can find someone who do full diagnostic and have a scanner for lexus /toyata they can do it....it only took a ride around the block to recalibrate the speed sensor 3 min it cost me a $100

Jasoneo5

iTrader: (4)

Sorry to bring up an old topic, but was your problem ever resolved? I just got a P0430 code as well and am having trouble beleiving its the cat. If O0430 is the bank 2, should I just replace the O2 sensor after the cat?

CosmicWall

Ok, I'm resurrecting this old post because I have a similar problem with a little twist and wanted to get your opinion.

I have a 2001 LS430, 139,000 miles and the dash has all the lights showing up - Check engine light is on, red exclamation light is on, VSC off indicator is on, Check VSC. Oh, and no heat (It's now November in Texas and gets a little cool).

Checked the ODB codes and get 0440 and 0115.

This great car was given to us by my deceased FIL and do not know if/when last coolant flush occurred. I checked coolant level in res and rad and both looked very low. I have occasionally smelled strong unburned gas fumes in garage. Will be replacing gas cap since it is 12 years old.

After reading through the many (and great) solutions, looks most like bad O2 sensors and coolant temp sensors.

Any other thoughts, ideas, solutions?