1 pointI appreciated the suggestions in this post when replacing my upstream sensors. I have no idea why the O2 heater low current test (runs only at engine start) also trips a VSC fault. But, like others my check engine light cleared immediately with new sensors and it seemed like a couple of starts and a short drive cleared the VSC issue as well. After having issues with getting test monitors to pass in several other vehicles, I simply drove the car for a month to let the stored fault code clear before getting a SMOG test. If anyone is following the Lexus LS 430 repair manuals, the inspection procedure on page 05-61 has a heater resistance specification at 5 to 10 ohms. The fault in my sensor was obvious, the heater circuit open. Both the opposite OEM side sensor and the new sensors all had heaters with resistance of 15 ohms, and I replaced both upstream sensors. I could not find / make a tool the separate the connectors and cut the drivers side sensor side connector in pieces, I would NOT recommend doing that as too much possibility to damage the body harness and spicing in a generic connector would be a better option. I also cut the small plastic tab off the new sensor connectors so they would not lock (used tie warps on the harness to ensure they stay mated). Therefore, the connectors would just pull apart in case I ever have to do this again. My guess is the more common fault is bank 1 (drivers side) due to the more extensive use of heat shields on that side.
1 pointUpdate, it turns out that the VSC warning was triggered by a failed O2 heater. Haven't found anyone that knows about a connection from the simple, only at engine start, test for low O2 heater current and the VSC. However, the VSC issue was noted on some of the discussions on the O2 sensor. Mine was the very common bank 1 (driver's side), sensor 1 fault, possibly common as the sensor is surrounded by some heat shields and probably runs hotter than the sensor on the other side. A bit painful to change the sensors, somewhat complicated by which orientation the connector is in. Mine connector was in an impossible position to push the tab, so I cut the connector on the sensor in pieces very carefully and pulled it apart. I would NOT recommend doing that, if you can't get the connectors apart the splice in a generic sensor. The O2 sensor fault was cleared immediately and a couple of engine starts plus a short drive later the VSC warning went away. Therefore, my old battery charger did not cause the VSC issue.
1 pointI have a certified 2016 es300h and updated the nav after purchase bc the nav was already 3+ years old. I bought the chip from dealer with discount and the upgraded myself. The upgrade is started in the map menu, then follow the screen instructions very easy. 10 minotes and done