hey guys, im kind of stumped on this, my wife's 2002 highlander has thrown codes for ever now, i keep coming up with p1155 and p1135 i have replaces both lower o2 sensors and both of them on top. its the 4cly one and has 4 damn sensors... but when i test for codes it also has o2s, cat, eva blinking... now is that just cause its affecting those areas, or is there more wrong? when she is driving it now we get it missing at 60mph and not only at idle like it use to. and this is her only car when she is in Oregon and im in Washington.

thanks justin