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Check engine light was on 2001 LS430 pulled codes found P0135 Oxygen Sensor Heater Circuit Malfunction Bank 1 Sensor 1 1. Bank 1 is on the drivers side, Bank 2 is on the passenger side 2. Sensor 1 is the upper sensor or upstream sensor in the manifold, Sensor 2 is the downstream sensor 3. Disconnect the sensor on the Driver Side, on mine the heatshield was too close to the sensor to be able to get anything in there to push the tab let alone a hand in there do disconnect it, I used a prybar and tweeked the shield a little so I could get a Right Angled Pick in there to push the tab down to release it, the tab is on the part of the connector that is attached via clip to a little metal bracket, and the tab is facing out toward the wheel. Passenger side is easier. 4. Remove the sensor, use an Oxygen Sensor Socket, there's not enough room to for a wrench, if you don't have one borrow one or buy it for $7-10 5. Save some money, if you have a hot enough soldering iron and you can solder you can cut and splice the old connector onto a new generic sensor. I usually stagger the wires to keep the thickness of the group of wires to a minimum. I DO NOT RECOMMEND using the generic connector to splice the wires, spend the extra effort and do it right. I also take the wires out of the connector (write down which goes in which hole they're number 1-4. I do this so I can work the wires/terminals also staggered through the outer shielding insulation it's a little stretchy but not enough, work it slowly and it will go. I also slice the thicker rubber cover off and put it back on where it was with that rubber electrical tape that sticks to itself but isn't tape. Or you can do it however you like. Advance Auto has them for about $75 if you need it now or you can find them cheaper online, the one I bought was a Bosch 15733 universal type, I believe they are the same both up stream and down stream. The Bosch is a newer style sensor that doesn't look like the original someone said that is a planar style or something like that that switches faster and works better than the older style thimble type. I replaced both of mine so they would age at the same speed, 100k on the clock I figured the other side would be soon to go as well. Plus I read somewhere about lazy sensors not setting codes but reducing your mileage. 6. Clear the codes, and take a ride if you get the VSC Off light on your dash immediately and the display says Check VSC ( Vehicle Stability Control I believe) it has to do with your code scanner when you read your codes, you'll need to get something to jumper between 2 pins on the obdc connector under the dash the TS and CG pins (see picture courtesy of FYOUNES on another site) dlc.bmp, ignition off, jumper the 2 pins, turn ignition on, don't start, wait until the vsc test comes up in the display, turn ignition off, pull jumper, start car, go for a ride. 7. Enjoy your ride you just saved a bunch of money 2 sensors for the price of one Denso or whatever that has the right connector. Short of time, get one with the right connector, you should be able to take care of it in about 30 minutes without all the soldering. Good luck

The GS300 has a saddle tank with a hump in it where the drive shaft passes through. It sound like the fuel from the passenger side of the take is not being transfered over to the side that has the fuel pump in it. A simple test would be the next time you run out of fuel remove the back seat and then the fuel sending unit from under the passenger side rear seat. If you see a lot of fuel then it is not transferring. There is a tube that comes from the passenger side to the fuel pump assembly on the drivers side. A device on the fuel pump assembly creates suction to bring the fuel across. If this device is broken or the line is kinked it will not work. Ben