CEL codes????

[legacygt420]

i got two codes- P0141 and P1133. what o2 sensor do i need to buy and is there anything else i need? i have knock-off headers, stock cats, and custom piping after all that. PLEASE HELP!!!!!!

[decke48]

what year car? p0141 is rear o2 heater malfuntion. P1133 is FRONT OXYGEN (A/F) SENSOR HEATER CIRCUIT HIGH INPUT
subaru had a recall on P1133 on 00-01. and replace the front o2, there is also a reflash for p1133 on 00-01. if your car falls in to this category call a dealer with your vin, and see if your car is subject to the recall