2000 RX300 and long story short, I have been clearing a bunch of codes by replacing things like knock censor, MAF sensor, coils in order to be able to pass emissions test.
I have one code left, P0171. I know this is typically the MAF, but since I just put a new one in, I can only think of the O2 sensors that are left.
Of the Bank 1 sensors, is one more common to fail than the other? Is there any way to tell which one needs replacement? Or do I do whichever is easier and cross my fingers?
Thanks in advance.
2003 RX300. Got the trouble code for the Heated O2 Sensor (Bank 1 Sensor 2). Lexuspartsnow.com says I need part number
I believe them so I bought the same exact part from Amazon even though their site says it doesn't fit, thinking the Lexus site will know better.
Got it installed fine and cleared the codes but the code keeps coming up every time I clear it. Did I just waste $140? Why would one site list it as fitting and the other doesn't? Could it potentially be another issue?
Hello Guys, first time posting here for me. But I have used this site on numerous occassions to help resolve issues with my 94 LS400.
So here is the deal. And yes, I have read MANY posts on this, but still am asking for some updated answers, because most of the related information is very old.
She failed MISERABLY the first time with double or triple the passing amounts in HC and NOx. After new CAT she barely passed the NOx portion, but still failed the HC portion with about 10% higher readings than allowed. Can anyone show me the location of the EGR Vacuum Modulator and such? Also, could this be O2 sensor related? The new CAT cleaned up a LOT, but clearly there is still some underlying problem, and I really dont want to replace both of the header CATs as they are quite expensive..... thank you.