sc300Super

I searched but no luck. im having tough time getting rid of cel code p1135 and p1155. I changed bank 1 senor and bank 2 sensor, but still having check engine light on. Dealer give me part #234-9020 for bank 1, Denso, does it make difference if part # last digit is different? after putting new ones in i'm still getting same cell. Old rear is (234-9021, Denso), front(part# 89467-48011, Denso). Please help...

GS4_Fiend

iTrader: (22)

There is a heater circuit relay and fuse. Check those and make sure they are good. That's the culprit of your problem, not the A/F sensor.