PLease help me explain these sensor data

Dear friends, my 2002 RX300 got error code P0171 and P0136 two weeks ago. I changed MAF sensor from Autozone. No big improvement. Last week, P0174 also showed up. I bought a cheap OBD2 adapter from Ebay and then installed free software scantool_netwin113 in my laptop. Today, I got sensor data from scantool. The screen shot is attached here. The values of O2 sensor B1S1 and B2S2 are unbelievable high.

Anyone can help me interpret it?

所有跟帖： 

• so just change O2 sensors. The voltages are high, seems faulty s -修volvo- ♂ (0 bytes) () 06/27/2010 postreply 17:45:19

• 這東西賊貴,要我就先洗.因為根本不知道新的換上去是否解決問題 -滿地找牙- ♂ (37 bytes) () 06/28/2010 postreply 08:13:34

• find vaccum leaking, fuel trims indicate mixture ratio OK, -fixanycars- ♀ (0 bytes) () 06/27/2010 postreply 19:52:36

• idle rpm is too high at warm engine, use smoke machine to locate -fixanycars- ♀ (48 bytes) () 06/27/2010 postreply 19:55:40