flyboy56

That code required me to change the bank 2 sensor 2. The sensor is on the passenger side about the middle of the door on the bottom. The sensor is easy to get to, the clip where it plugs into, is not. You have to take out the passenger seat, lift up the carpet and padding, and it is located near the center console. Lexus wanted $198 for their sensor which is a denso, i found a bosch for $161 and right on the sensor it says made by denso. You can buy the cheaper heated sensors and splice them in so that you don't have to do all that, but I wanted to eliminate as many possible problem areas as I could. I did have to change with the cars end of the wiring was mounted a little, just cut the tape, because the new O2 sensors harness was about 5 inches shorter. I have not had that code or the misfires come up since. Now I am trying to figure out the intake camshaft postion sensor problem and that one requires some engine parts to be taken off. Hope this helps. John

Just want to double check my readings. I called Lexus yesterday and the techs had all gone home the the parts people had no idea. Have a bad o2 bank 2 sensor 2. Thanks

Here is some background, 2001 IS 300 Previous salvage CEL has been on for long time, always ran fine. Since cold weather has set in runs like crap..I mean 10mph max until it gets good and warmed up. When cold CEL will flash along with trac off. Bought a scan tool last night. came up with: random misfires on 3 cyl. the same p0161 code witch is the O2 sensor heater circuit malfunction, and the p1346 Intake CMP Sensor System Performance. I cleared those codes and today i let it idle till warm..no CEL. took it down the street watching the I/M Readiness screen. Two codes popped up when the system had enough time to test Oxygen sensor heater monitor P0161 - O2 sensor heater circuit malfunction bank 2 sensor2 and P1346 again. I have replaced all the plugs, blew out the MAF. What should be my next move? the bank 2 sensor 2(the one from the code) was acting a little funny too, i was watching the data and at idle it would hop around the ideal mv range, however when i would pump the throttle it would go to 0.000 and stay there for quite some time, where as the others would go right back to the mv readings. Where/what is the O2 sensor heater circuit? how do I test to see if it is good/bad? My wife is nagging about her car so any help would be great. Thanks for your time. John

Hello, I am having this same problem with my 2001 IS Right now, getting misfire on cyl. 1, 5 and 6. Sounds like I need to look into new coils. My question is on an 2001 IS are there seperate coils for each cyl. or not? I only have 50,000 miles on mine, I just changed the all the plugs last weekend think that might help, but noooo. Thanks for the help, my wife is nagging at me hard to fix her car...heeelllppp! John